wherein R¹ is hydrogen or metabolic ester residue; and R² is hydrogen or -R³-R⁴ wherein R³ is -SO₃-, -CH₂COO-, -COCOO-, or -COR⁵COO- (R⁵ is lower alkylene or lower alkenylene), and R⁴ is hydrogen or metabolic ester residue, or pharmaceutically acceptable salts thereof, have anti-endothelin activities and are useful in prophylaxis and treatment of diseases caused by excessive secretion of endothelin.
摘要:
Intermediate compounds for the preparation of endothelin-receptor antagonist triterpene compounds have the formula
wherein R 2 is hydrogen or -R 3- R 4 wherein R 3 is -SO 3 -, -CH 2 COO-, -COCOO-, or -COR 5 COO- wherein R 5 is C 1 - C 6 alkylene or up to C 6 alkenylene, R 4 is hydrogen, straight or branched C 1 - C 6 alkyl and R 6 is t-butoxycarbonyl or hydrogen, or a pharmaceutically acceptable salt thereof.
摘要:
Intermediate compounds for the preparation of endothelin-receptor antagonist triterpene compounds have the formula
wherein R 2 is hydrogen or -R 3- R 4 wherein R 3 is -SO 3 -, -CH 2 COO-, -COCOO-, or -COR 5 COO- wherein R 5 is C 1 - C 6 alkylene or up to C 6 alkenylene, R 4 is hydrogen, straight or branched C 1 - C 6 alkyl and R 6 is t-butoxycarbonyl or hydrogen, or a pharmaceutically acceptable salt thereof.