Novel inhibitors of influenza sialidases related to zanamivir. Heterocyclic replacements of the glycerol sidechain
摘要:
A series of substituted 4-amino-4H-pyran-2-carboxylic acid 6-triazoles and oxadiazoles are described. The compounds are inhibitors of influenza virus sialidases which: in general, show a similar pattern of activity and selectivity to recently reported 4H-pyran-2-carboxylic acid 6-carboxamides. (C) 1997 Elsevier Science Ltd.
Combretastatin A4-β-Galactosyl Conjugates for Ovarian Cancer Prodrug Monotherapy
摘要:
Chemotherapy for ovarian cancer often causes severe side effects. As candidates for combretastatin A4 (CA4) prodrug for ovarian cancer prodrug monotherapy (PMT), we designed and synthesized two beta-galactose-conjugated CA4s (CA4-beta Gals), CA4-beta Gal-1 and CA4-beta Gal-2. CA4 was liberated from CA4-beta Gals by beta-galactosidase, an enzyme more strongly expressed in ovarian cancer cells than normal cells. CA4-beta Gal-2, which has a self-immolative benzyl linker between CA4 and the beta-galactose moiety, was more cytotoxic to ovarian cancer cell lines than CA4-beta Gal-1 without a linker. Therefore, CA4-beta Gal-2 can serve as a platform for the design and manufacture of prodrugs for ovarian cancer PMT.