Leptomycin A

Leptomycin A is an inhibitor of CRM1 (exportin 1) that blocks CRM1 interaction with nuclear export signals, preventing the nuclear export of a broad range of proteins. Leptomycin A inhibits Rev translocation, though less potently than leptomycin B (Cay-10004976) with IC50 values of 0.8 and 0.1 nM, respectively after 7 hours. Rev export to the cytoplasm is required for HIV-1 replication. Leptomycin A was originally identified as an antifungal agent.Formal Name: (2E,6R)-19-[(2S,3S)-3,6-dihydro-3-methyl-6-oxo-2H-pyran-2-yl]-6-hydroxy-3,5S,7S,9R,11,15R,17-heptamethyl-8-oxo-2,10E,12E,16Z,18E-nonadecapentaenoic acid. CAS Number: 87081-36-5. Synonyms: NSC 369326. Molecular Formula: C32H46O6. Formula Weight: 526.7. Purity: >99%. Formulation: (Request formulation change), A solution in ethanol. Solubility: Ethanol: Soluble, Methanol: Soluble. SMILES: O=C1O[C@@H](/C=C/C(C)=C\[C@H](C)C/C=C/C(C)=C/[C@H](C([C@H]([C@@H]([C@H](C/C(C)=C/C(O)=O)C)O)C)=O)C)[C@@H](C)C=C1. InChi Code: InChI=1S/C32H46O6/c1-20(16-22(3)12-14-28-24(5)13-15-30(35)38-28)10-9-11-21(2)17-25(6)31(36)27(8)32(37)26(7)18-23(4)19-29(33)34/h9,11-17,19-20,24-28,32,37H,10,18H2,1-8H3,(H,33,34)/b11-9+,14-12+,21-17+,22-16-,23-19+/t20-,24+,25-,26+,27-,28+,32-/m1/s1. InChi Key: QECBVZBMGUAZDL-WRDLAOIUSA-N.