retaspimycin hydrochloride   Click here for help

GtoPdb Ligand ID: 9827

Synonyms: 17-AAG (hydrochloride) | 17-Allylamino-17-demethoxygeldanamycin (hydrochloride) | IPI-504 | IPI504
Compound class: Synthetic organic
Comment: 17-Allylamino-17-demethoxygeldanamycin (17-AAG)1 is a semisynthetic inhibitor of the 90 kDa heat shock protein (Hsp90) currently in clinical trials for the treatment of cancer. However, 17-AAG faces challenging formulation issues due to its poor solubility. The synthesis and evaluation of a highly soluble hydroquinone hydrochloride derivative of 17-AAG, 1a (IPI-504) was reported in [1]. A Phase I trial indicated this was well-tolerated with some evidence of antitumor activity, serving as a clinical proof-of-concept that HSP90 inhibition remains promising [2]. Note this ligand entry is an exception to our general rule of salt-stripping because it is clear in this case that the hydorchoride is being used. The parent structure is PubChem CID 11534420.
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Ligand Activity Visualisation Charts

These are box plot that provide a unique visualisation, summarising all the activity data for a ligand taken from ChEMBL and GtoPdb across multiple targets and species. Click on a plot to see the median, interquartile range, low and high data points. A value of zero indicates that no data are available. A separate chart is created for each target, and where possible the algorithm tries to merge ChEMBL and GtoPdb targets by matching them on name and UniProt accession, for each available species. However, please note that inconsistency in naming of targets may lead to data for the same target being reported across multiple charts.

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2D Structure
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2D Structure

An image of the ligand's 2D structure. For small molecules with SMILES these are drawn using the NCI/CADD Chemical Identifier Resolver. Click on the image to access the chemical structure search tool with the ligand pre-loaded in the structure editor. For other types of ligands, e.g. longer nucleotides and peptides, a manually drawn representation of the molecule may be provided.

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SMILES / InChI / InChIKey
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SMILES / InChI / InChIKey

SMILES (Simplified Molecular Input Line Entry Specification) A specification for unambiguously describing the structure of chemical molecules using short ASCII strings. Canonical SMILES specify a unique representation of the 2D structure without chiral or isotopic specifications. Isomeric SMILES include chiral specification and isotopes.

Standard InChI (IUPAC International Chemical Identifier) and InChIKey InChI is a non-proprietary, standard, textual identifier for chemical substances designed to facilitate linking of information and database searching. An InChIKey is a simplified version of a full InChI, designed for easier web searching.

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Canonical SMILES C=CCNc1c(O)cc2c(c1CC(C)CC(OC)C(O)C(C)C=C(C)C(C(C=CC=C(C(=O)N2)C)OC)OC(=O)N)O.Cl
Isomeric SMILES C=CCNc1c(O)cc2c(c1C[C@@H](C)C[C@H](OC)[C@H](O)[C@@H](C)/C=C(\C)/[C@@H]([C@H](/C=C\C=C(\C(=O)N2)/C)OC)OC(=O)N)O.Cl
InChI InChI=1S/C31H45N3O8.ClH/c1-8-12-33-26-21-13-17(2)14-25(41-7)27(36)19(4)15-20(5)29(42-31(32)39)24(40-6)11-9-10-18(3)30(38)34-22(28(21)37)16-23(26)35;/h8-11,15-17,19,24-25,27,29,33,35-37H,1,12-14H2,2-7H3,(H2,32,39)(H,34,38);1H/b11-9-,18-10+,20-15+;/t17-,19+,24+,25+,27-,29+;/m1./s1
InChI Key OIRUWDYJGMHDHJ-AFXVCOSJSA-N
References
1. Ge J, Normant E, Porter JR, Ali JA, Dembski MS, Gao Y, Georges AT, Grenier L, Pak RH, Patterson J et al.. (2006)
Design, synthesis, and biological evaluation of hydroquinone derivatives of 17-amino-17-demethoxygeldanamycin as potent, water-soluble inhibitors of Hsp90.
J Med Chem, 49 (15): 4606-15. [PMID:16854066]
2. Wagner AJ, Chugh R, Rosen LS, Morgan JA, George S, Gordon M, Dunbar J, Normant E, Grayzel D, Demetri GD. (2013)
A phase I study of the HSP90 inhibitor retaspimycin hydrochloride (IPI-504) in patients with gastrointestinal stromal tumors or soft-tissue sarcomas.
Clin Cancer Res, 19 (21): 6020-9. [PMID:24045182]