Patent ID: 6121463
Filing Date: 2000-09-19
Classification: C07F

Abstract:
A compound of the formula ##STR28## wherein R is hydrogen or --C(O)--(CH.sub.2).sub.m --Q wherein Q is hydrogen or --COOH and m is an integer 1, 2, 3 or 4;R.sub.1, R.sub.5 and R.sub.6 are independently a C.sub.1 -C.sub.6 alkyl group;R.sub.2, R.sub.3 and R.sub.4 are independently hydrogen or a C.sub.1 -C.sub.6 alkyl group;Z is thio, oxy or a methylene group;A is a C.sub.1 -C.sub.4 alkylene group;X is thio or oxy; andG.sub.1 and G.sub.2 are independently hydrogen, C.sub.1 -C.sub.6 alkyl or --C(O)--(CH.sub.2).sub.n --CH.sub.3 and n is an integer 0, 1, 2 or 3;or a pharmaceutically acceptable salt thereof.