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Ganetespib (STA-9090) HSP90 Inhibitor

Name: Ganetespib (STA-9090)
Brand: Selleck Chemicals
SKU: S1159
Rating: 5 (80 reviews)

Cat. No.: S1159

Ganetespib (STA-9090) es un inhibidor de HSP90 con una IC50 de 4 nM en células OSA 8, induce la apoptosis de las células OSA mientras que los osteoblastos normales no se ven afectados; metabolito activo de STA-1474. Fase 3.

Ganetespib (STA-9090) HSP Inhibidor Chemical Structure

Estructura química

Peso molecular: 364.4

Saltar a

Control de calidad (Quality Control)

Lote: Pureza: 99.97%

99.97

Dianas relacionadas	Akt Wnt/beta-catenin PKC ROCK Microtubule Associated Integrin Bcr-Abl Actin FAK Kinesin
Otros HSP Inhibidores	Tanespimycin (17-AAG) Elesclomol (STA-4783) Luminespib (NVP-AUY922) Alvespimycin (17-DMAG) Hydrochloride VER-155008 Onalespib (AT13387) BIIB021 Celastrol (Tripterine) Zelavespib (PU-H71) NVP-BEP800

Cultivo celular, tratamiento y concentración de trabajo
(Cell Culture, Treatment & Working Concentration)

Líneas celulares	Tipo de ensayo	Concentración	Tiempo de incubación	Formulación	Descripción de la actividad	PMID
NCI-H1975	Growth Inhibition Assay		72 h		IC50=8 nM	22144665
NCI-H1975	Growth Inhibition Assay		48 h		IC50=16 nM	22144665
Calu-6	Growth Inhibition Assay				IC50=64 nM	23012248
Calu-1	Growth Inhibition Assay				IC50=58 nM	23012248
H2122	Growth Inhibition Assay				IC50=53 nM	23012248
A549	Growth Inhibition Assay				IC50=43 nM	23012248
H358	Growth Inhibition Assay				IC50=29 nM	23012248
H1734	Growth Inhibition Assay				IC50=28 nM	23012248
H727	Growth Inhibition Assay				IC50=28 nM	23012248
COR-L23	Growth Inhibition Assay				IC50=22 nM	23012248
H1792	Growth Inhibition Assay				IC50=20 nM	23012248
H2009	Growth Inhibition Assay				IC50=19 nM	23012248
SK-LU-1	Growth Inhibition Assay				IC50=18 nM	23012248
H2212	Growth Inhibition Assay				IC50=17 nM	23012248
H441	Growth Inhibition Assay				IC50=14 nM	23012248
H2030	Growth Inhibition Assay				IC50=12 nM	23012248
H23	Growth Inhibition Assay				IC50=11 nM	23012248
HOP-62	Growth Inhibition Assay				IC50=11 nM	23012248
IA-LM	Growth Inhibition Assay				IC50=10 nM	23012248
H460	Growth Inhibition Assay				IC50=8 nM	23012248
H157	Growth Inhibition Assay				IC50=7 nM	23012248
H1355	Growth Inhibition Assay				IC50=5 nM	23012248
VCaP	Growth Inhibition Assay				IC50=7 nM	23152004
LNCaP	Growth Inhibition Assay				IC50=8 nM	23152004
Ramos-RA1	Growth Inhibition Assay				IC50=7.4 nM	23303741
Karpas-299	Growth Inhibition Assay				IC50=9.6 nM	23303741
Kasumi-1	Growth Inhibition Assay				IC50=5.8 nM	23303741
CCRF-CEM (2)	Growth Inhibition Assay				IC50=7.2 nM	23303741
CCRF-CEM (1)	Growth Inhibition Assay				IC50=12.5 nM	23303741
MOLT-4	Growth Inhibition Assay				IC50=10.6 nM	23303741
RS4;11	Growth Inhibition Assay				IC50=13.5 nM	23303741
COG-LL-317	Growth Inhibition Assay				IC50=4.4 nM	23303741
NALM-6	Growth Inhibition Assay				IC50=11.7 nM	23303741
CHLA-136	Growth Inhibition Assay				IC50=23.2 nM	23303741
CHLA-90	Growth Inhibition Assay				IC50=22.3 nM	23303741
NB-EBc1	Growth Inhibition Assay				IC50=16.8 nM	23303741
NB-1643	Growth Inhibition Assay				IC50=7.4 nM	23303741
SJ-GBM2	Growth Inhibition Assay				IC50=12.9 nM	23303741
CHLA-258	Growth Inhibition Assay				IC50=6.4 nM	23303741
CHLA-10	Growth Inhibition Assay				IC50=5.7 nM	23303741
CHLA-9	Growth Inhibition Assay				IC50=4.6 nM	23303741
TC-71	Growth Inhibition Assay				IC50=4.5 nM	23303741
CHLA-266	Growth Inhibition Assay				IC50=27.1 nM	23303741
BT-12	Growth Inhibition Assay				IC50=14.3 nM	23303741
Rh30	Growth Inhibition Assay				IC50=5.6 nM	23303741
Rh18	Growth Inhibition Assay				IC50=6.2 nM	23303741
Rh41	Growth Inhibition Assay				IC50=10.4 nM	23303741
RD	Growth Inhibition Assay				IC50=8 nM	23303741
K033	Apoptosis Assay	100 nM	72 h		significantly induces apoptosis	23418523
M23	Apoptosis Assay	100 nM	72 h		significantly induces apoptosis	23418523
K029	Apoptosis Assay	100 nM	72 h		significantly induces apoptosis	23418523
K028	Apoptosis Assay	100 nM	72 h		significantly induces apoptosis	23418523
K008	Apoptosis Assay	100 nM	72 h		significantly induces apoptosis	23418523
K033	Function Assay	250 nM	24 h		induces a modest increase in G1 population	23418523
M23	Function Assay	250 nM	24 h		induces G1 and G2/M arrest	23418523
K029	Function Assay	250 nM	24 h		induces G1 arrest	23418523
K028	Function Assay	250 nM	24 h		induces G2 arrest	23418523
K008	Function Assay	250 nM	24 h		induces G2 arrest	23418523
K033	Cell Viability Assay				IC50=75.5 nM	23418523
M23	Cell Viability Assay				IC50=37.5 nM	23418523
K029	Cell Viability Assay				IC50=46 nM	23418523
K028	Cell Viability Assay				IC50=84 nM	23418523
K008	Cell Viability Assay				IC50=60 nM	23418523
H3122	Cell Viability Assay	0-1000 nM	72 h		IC50=10 nM	23533265
H2228	Cell Viability Assay	0-1000 nM	72 h		IC50=13 nM	23533265
A1847	Apoptosis Assay	10-100 nM	24/48/72 h		induces apoptosis time and dose dependently	23900136
OVCAR-8	Apoptosis Assay	10-100 nM	24/48/72 h		induces apoptosis time and dose dependently	23900136
OVCAR-5	Apoptosis Assay	10-100 nM	24/48/72 h		induces apoptosis time and dose dependently	23900136
SKOV-3	Cell Viability Assay	0-1000 nM	72 h		inhibits cell viability dose dependently	23900136
A1847	Cell Viability Assay	0-1000 nM	72 h		inhibits cell viability dose dependently	23900136
OVCAR-8	Cell Viability Assay	0-1000 nM	72 h		inhibits cell viability dose dependently	23900136
OVCAR-5	Cell Viability Assay	0-1000 nM	72 h		inhibits cell viability dose dependently	23900136
H146	Function Assay	30 nM	72 h		induces persistent G2/M phase arrest	24166505
GLC4	Function Assay	30 nM	72 h		induces persistent G2/M phase arrest	24166505
H82	Function Assay	30 nM	72 h		induces persistent G2/M phase arrest	24166505
AC3	Growth Inhibition Assay				IC50=25.9 nM	24166505
H1173	Growth Inhibition Assay				IC50=12.62 nM	24166505
H792	Growth Inhibition Assay				IC50=45.07 nM	24166505
H620	Growth Inhibition Assay				IC50=32.67 nM	24166505
N592	Growth Inhibition Assay				IC50=14.12 nM	24166505
H526	Growth Inhibition Assay				IC50=21.64 nM	24166505
H187	Growth Inhibition Assay				IC50=24.99 nM	24166505
H146	Growth Inhibition Assay				IC50=28.51 nM	24166505
H128	Growth Inhibition Assay				IC50=69.55 nM	24166505
H69	Growth Inhibition Assay				IC50=83.36 nM	24166505
GLC4	Growth Inhibition Assay				IC50=20.47 nM	24166505
H82	Growth Inhibition Assay				IC50=30.27 nM	24166505
MDA-MB-231	Function Assay	100 nM	24 h		inhibits the migratory and invasive capacity	24173541
BT-20	Function Assay	100/250 nM	24 h		resulted in a dose-dependent destabilization of EGFR, IGF-IR, MET, and CRAF	24173541
MDA-MB-435	Function Assay	100 nM	30 min		inhibits accumulation of HIF-1α	24248265
MDA-MB-231	Function Assay	100 nM	30 min		inhibits accumulation of HIF-1α	24248265
HCC2998	Growth Inhibition Assay				IC50=128 nM	24682747
SK-CO-1	Growth Inhibition Assay				IC50=81 nM	24682747
LS-123	Growth Inhibition Assay				IC50=73 nM	24682747
SNU-C2B	Growth Inhibition Assay				IC50=45 nM	24682747
LS-1034	Growth Inhibition Assay				IC50=31 nM	24682747
LoVo	Growth Inhibition Assay				IC50=22 nM	24682747
COLO-678	Growth Inhibition Assay				IC50=21 nM	24682747
NCI-H747	Growth Inhibition Assay				IC50=17 nM	24682747
COLO-205	Growth Inhibition Assay				IC50=14 nM	24682747
HCT 116	Growth Inhibition Assay				IC50=14 nM	24682747
HuTu-80	Growth Inhibition Assay				IC50=13 nM	24682747
HCT-15	Growth Inhibition Assay				IC50=8 nM	24682747
SW620	Growth Inhibition Assay				IC50=8 nM	24682747
LS-411 N	Growth Inhibition Assay				IC50=5 nM	24682747
RKO	Growth Inhibition Assay				IC50=4 nM	24682747
SW780	Growth Inhibition Assay				IC50=3451 nM	24784839
RT4	Growth Inhibition Assay				IC50=1733 nM	24784839
TCCSUP	Growth Inhibition Assay				IC50=142 nM	24784839
MGH-U3	Growth Inhibition Assay				IC50=53 nM	24784839
HT-1197	Growth Inhibition Assay				IC50=53 nM	24784839
5637	Growth Inhibition Assay				IC50=44 nM	24784839
35612	Growth Inhibition Assay				IC50=38 nM	24784839
KU-19-19	Growth Inhibition Assay				IC50=36 nM	24784839
LB831-BLC	Growth Inhibition Assay				IC50=34 nM	24784839
UM-UC3	Growth Inhibition Assay				IC50=33 nM	24784839
647-V	Growth Inhibition Assay				IC50=27 nM	24784839
HT-1376	Growth Inhibition Assay				IC50=21 nM	24784839
J82	Growth Inhibition Assay				IC50=18 nM	24784839
BFTC	Growth Inhibition Assay				IC50=17 nM	24784839
SCaBER	Growth Inhibition Assay				IC50=10 nM	24784839
639-V	Growth Inhibition Assay				IC50=10 nM	24784839
RT112	Growth Inhibition Assay				IC50=9 nM	24784839
T24	Growth Inhibition Assay				IC50=7 nM	24784839
SW-1710	Growth Inhibition Assay				IC50=6 nM	24784839
DSH1	Growth Inhibition Assay				IC50=6 nM	24784839
CAL27	Cytoxicity Assay	10/50 nM	24 h		decreases cell proliferation dose dependently	25205430
Detroit562	Cytoxicity Assay	10/50 nM	24 h		decreases cell proliferation dose dependently	25205430
FUDA	Cytoxicity Assay	10/50 nM	24 h		decreases cell proliferation dose dependently	25205430
SCC25	Cytoxicity Assay	10/50 nM	24 h		decreases cell proliferation dose dependently	25205430
HT-29	Function Assay	50nM	24 h	DMSO	induced G0/G1 arrest	25210794
HCT-116	Function Assay	50nM	24 h	DMSO	induced G0/G1 arrest	25210794
MGC-803	Function Assay	0.1-1000 nM	24 h		induces G2/M cell-cycle arrest	25590805
MKN-28	Cell Viability Assay	0.1-1000 nM	72 h		inhibits cell viability dose dependently	25590805
SGC-7901	Cell Viability Assay	0.1-1000 nM	72 h		inhibits cell viability dose dependently	25590805
MGC-803	Cell Viability Assay	0.1-1000 nM	72 h		inhibits cell viability dose dependently	25590805
MV411	Apoptosis Assay	30/80/150/250 nM	24/48/72 h		induces dose dependant induction of apoptosis	25882550
HL60	Apoptosis Assay	30/80/150/250 nM	24/48/72 h		induces dose dependant induction of apoptosis	25882550
TC32	qHTS assay				qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for TC32 cells	29435139
A673	qHTS assay				qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for A673 cells	29435139
Saos-2	qHTS assay				qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for Saos-2 cells	29435139
BT-37	qHTS assay				qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for BT-37 cells	29435139
RD	qHTS assay				qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for RD cells	29435139
SK-N-SH	qHTS assay				qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for SK-N-SH cells	29435139
NB1643	qHTS assay				qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for NB1643 cells	29435139
OHS-50	qHTS assay				qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for OHS-50 cells	29435139
A673	qHTS assay				qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for A673 cells)	29435139
SJ-GBM2	qHTS assay				qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for SJ-GBM2 cells	29435139
SK-N-MC	qHTS assay				qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for SK-N-MC cells	29435139
NB-EBc1	qHTS assay				qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for NB-EBc1 cells	29435139
LAN-5	qHTS assay				qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for LAN-5 cells	29435139
Rh18	qHTS assay				qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for Rh18 cells	29435139
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Información química, almacenamiento y estabilidad (Chemical Information, Storage & Stability)

Peso molecular	364.4	Fórmula	C₂₀H₂₀N₄O₃	Almacenamiento (Desde la fecha de recepción)	3 años-20°Cpolvo
Nº CAS	888216-25-9	Descargar SDF		Almacenamiento de soluciones madre	1 año-80°Cen disolvente 1 mes-20°Cen disolvente
Sinónimos	N/A			Smiles	CC(C)C1=C(C=C(C(=C1)C2=NNC(=O)N2C3=CC4=C(C=C3)N(C=C4)C)O)O

Solubilidad (Solubility)

In vitro
Lote:

DMSO : 40 mg/mL (109.76 mM)
(El DMSO contaminado con humedad puede reducir la solubilidad. Usar DMSO fresco y anhidro.)

Ethanol : 9 mg/mL

Water : Insoluble

Calculadora de Molaridad

Masa	Concentración	Volumen	Peso molecular
=	×	×

Calculadora de Dilución Calculadora de Peso Molecular

In vivo Lote:
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Clear solution	5%DMSO 1 40%PEG300 2 5%Tween80 3 50%ddH2O Validado por los laboratorios Selleck. Si necesita ajustes en esta formulación, contacte con nuestro equipo de ventas para pruebas personalizadas.	5.000mg/ml (13.72mM)	Taking the 1 mL working solution as an example, add 50 μL of 100 mg/ml clarified DMSO stock solution to 400 μL of PEG300, mix evenly to clarify it; add 50 μL of Tween80 to the above system, mix evenly to clarify; then continue to add 500 μL of ddH2O to adjust the volume to 1 mL. The mixed solution should be used immediately for optimal results.
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.

Calculadora de formulación in vivo (Solución clara)

Paso 1: Introduzca la información a continuación (Recomendado: Un animal adicional para tener en cuenta la pérdida durante el experimento)

Dosis: mg/kg Peso promedio de los animales: g Volumen de dosificación por animal:μL Número de animales:

Paso 2: Introduzca la formulación in vivo (Esto es solo la calculadora, no la formulación. Por favor, contáctenos primero si no hay una formulación in vivo en la sección de Solubilidad.)

% DMSO + % + % Tween 80 + % ddH₂O

%DMSO+ %

Resultados del cálculo:

Concentración de trabajo: mg/ml;

Método para preparar el líquido maestro de DMSO: mg fármaco predissuelto en μL DMSO ( Concentración del líquido maestro mg/mL, Por favor, contáctenos primero si la concentración excede la solubilidad del DMSO del lote del fármaco. )

Método para preparar la formulación in vivo: Tomar μL DMSO líquido maestro, luego añadirμL PEG300, mezclar y clarificar, luego añadirμL Tween 80, mezclar y clarificar, luego añadir μL ddH₂O, mezclar y clarificar.

Método para preparar la formulación in vivo: Tomar μL DMSO líquido maestro, luego añadir μL Aceite de maíz, mezclar y clarificar.

Nota: 1. Por favor, asegúrese de que el líquido esté claro antes de añadir el siguiente disolvente.
2. Asegúrese de añadir el (los) disolvente(s) en orden. Debe asegurarse de que la solución obtenida, en la adición anterior, sea una solución clara antes de proceder a añadir el siguiente disolvente. Se pueden utilizar métodos físicos como el vórtice, el ultrasonido o el baño de agua caliente para ayudar a la disolución.

Mecanismo de acción (Mechanism of Action)

Targets/IC₅₀/Ki	HSP90 (OSA 8 cells) 4 nM
In vitro	Las concentraciones inhibitorias al 50% (IC50) para Ganetespib (STA-9090) contra líneas celulares de mastocitos malignos son 10-50 veces menores que las de 17-AAG, lo que indica que la clase de triazolona de inhibidores de HSP90 probablemente exhibe una mayor potencia que los inhibidores basados en geldanamicina. Este compuesto inhibe las líneas celulares MG63 con una IC50 de 43 nM. Se une al dominio de unión a ATP en el N-terminal de Hsp90 y sirve como un potente inhibidor de Hsp90 al causar la degradación de múltiples proteínas cliente oncogénicas de Hsp90, incluyendo HER2/neu, EGFR mutado, Akt, c-Kit, IGF-1R, PDGFRα, Jak1, Jak2, STAT3, STAT5, HIF-1α, CDC2 y c-Met, así como el tumor de Wilms 1. A bajas concentraciones nanomolares, detiene potentemente la proliferación celular e induce la apoptosis en una amplia variedad de líneas celulares de cáncer humano, incluidas muchas líneas celulares resistentes a inhibidores de tirosina quinasa y a tanespimicina. Exhibe una potente citotoxicidad en una variedad de líneas celulares tumorales sólidas y hematológicas, incluidas aquellas que expresan quinasas mutadas que confieren resistencia a inhibidores de tirosina quinasa de moléculas pequeñas. Su tratamiento causó rápidamente la degradación de proteínas cliente de Hsp90 conocidas, exhibe una potencia superior al inhibidor de ansamicina 17-AAG y muestra actividad sostenida incluso con tiempos de exposición cortos. En otro estudio, induce la apoptosis de líneas celulares de mastocitos malignos caninos. Es activo a concentraciones significativamente más bajas para mastocitos malignos caninos C2 y BR con IC50 de 19 y 4 nM, respectivamente, mientras que 17-AAG inhibe mastocitos malignos caninos C2 y BR con IC50 de 958 y 44 nM, respectivamente. Tanto la expresión de Kit WT como mutante se regulan a la baja por 100 nM de este compuesto después de 24 horas en todas las líneas tratadas, incluidas las células C2 y BMCMCs. Sin embargo, no se observan efectos sobre la expresión de PI3K o HSP90 después del tratamiento.
In vivo	La administración de Ganetespib (STA-9090) conduce a una reducción significativa del tamaño del tumor en varios modelos de xenoinjertos tumorales en ratones y parece ser menos tóxica. Además, este compuesto demostró una mejor penetración tumoral en comparación con tanespimicina. Inhibe el crecimiento tumoral in vivo tanto en modelos de xenoinjertos de mastocitos malignos como de OSA. Ganetespib inhibe significativamente el crecimiento tumoral cuando se dosifica con dos ciclos repetidos de 25 mg/kg/día durante 3 días, con un valor de %T/C de 18. Es bien tolerado, con los grupos vehículo y Ganetespib presentando cambios de peso corporal promedio con respecto al inicio del estudio de +0.3% y -8.1% en el día 17, respectivamente.
Referencias	[1] https://pubmed.ncbi.nlm.nih.gov/19544563/ [2] https://pubmed.ncbi.nlm.nih.gov/21154128/ [3] https://pubmed.ncbi.nlm.nih.gov/22144665/ [4] https://pubmed.ncbi.nlm.nih.gov/18657349/

Aplicaciones (Applications)

Métodos	Biomarcadores	Imágenes	PMID
Western blot	EGFR / c-Met / IGF-1Rβ/ Akt / p-Akt / ERK / p-ERK p27(Kip1) / p21 (Cip1) / Cyclin D1 / Cyclin E / Cyclin B1 / CDK1 / CDK2 / CDK4 Survivin / Bcl-2 / Bcl-xl / Mcl-1 B-RAF / C-RAF / N-RAS HER2 / p-STAT3 / BIM CDK1 / Cyclin D1 / Cyclin B1 / p27 c-PARP / c-caspase 3 / caspase 8 / c-caspase 8 / caspase 9 / c-caspase 9 ErbB2 / pErbB2 / Src / pSrc / mTOR / pmTOR / Bad / pBad / GSK3 / pGSK3 Wee1 / p-Wee1 / Chk1 / p-Chk1		23418523
Growth inhibition assay	Cell viability		23418523

Información del ensayo clínico (Clinical Trial Information)

(datos de https://clinicaltrials.gov, actualizado el 2024-05-22)

Número NCT	Reclutamiento	Condiciones	Patrocinador/Colaboradores	Fecha de inicio	Fases
NCT02192541	Terminated	Neoplasms	National Cancer Institute (NCI)\|National Institutes of Health Clinical Center (CC)	December 2 2014	Phase 1
NCT02008877	Completed	Malignant Peripheral Nerve Sheath Tumors (MPNST)\|Sarcoma	Sarcoma Alliance for Research through Collaboration\|Synta Pharmaceuticals Corp.\|United States Department of Defense	December 2013	Phase 1\|Phase 2

Preguntas frecuentes (Frequently Asked Questions)

Pregunta 1:
Does this inhibitor inhibit both isoforms of HSP90?

Respuesta:
We don't have the information now and it is not very clear in the literature either. From following two references, it indicates that it might be specific to the alpha form “It binds to the ATP binding site of Hsp90 alpha with a Kd of 110 nM” http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3477583/

C1=C0/X	C1:	LOG(C1):
C2=C1/X	C2:	LOG(C2):
C3=C2/X	C3:	LOG(C3):
C4=C3/X	C4:	LOG(C4):
C5=C4/X	C5:	LOG(C5):
C6=C5/X	C6:	LOG(C6):
C7=C6/X	C7:	LOG(C7):
C8=C7/X	C8:	LOG(C8):