Camptothecin derivatives and the use thereof as antitumor agents

摘要

PCT No. PCT/EP97/00786 Sec. 371 Date Aug. 20, 1998 Sec. 102(e) Date Aug. 20, 1998 PCT Filed Feb. 19, 1997 PCT Pub. No. WO97/31003 PCT Pub. Date Aug. 28, 199720S-Camptothecin derivatives in which the 7-position bears as a substituent -CN, -CH(CN)R4, -CH=C(CN)R4, -C(=NOH)NH2, -C(=NH)NH2, -CH=C(NO2)R4, -CH(CN)R5, -CH(CH2NO2)R5, tetrazol-5-yl, 4,5-dihydrooxazol-2-yl, or 1,2,4-oxadiazolin-3-yl-5-one. These compounds are active as topoisomerase I inhibitors, and can be used as antitumor drugs.