Pharmaceutical piperazine compounds

摘要

PCT No. PCT/GB95/03029 Sec. 371 Date Aug. 29, 1997 Sec. 102(e) Date Aug. 29, 1997 PCT Filed Dec. 22, 1995 PCT Pub. No. WO96/20180 PCT Pub. Date Jul. 4, 1996A piperazinedione of general formula (I): wherein R1 is selected from hydrogen; a group of formula -(NH)t-COR3 wherein t is 0 or 1 and R3 is an organic substituent as defined herein; a group of formula (D): and a group of formula (E): and the pharmaceutically acceptable salts thereof are useful as modulators of multi-drug resistance.