Patent ID: 6610877
Filing Date: 2003-08-26
Classification: A61P,C07C

Abstract:
A compound having the formula: whereinR2 is C2-8-alkanoyl, C2-8-alkyl, C2-8-alkenyl, C2-8-alkynyl or â€”OCH2R3; R3 is hydrogen, C1-6-alkyl, C2-6-alkenyl or C2-6-alkynyl; R5 and R7 each independently are hydrogen or C1-5-alkyl; R4 and R6 each independently are hydrogen or C1-5-alkyl, or taken together are methylene or ethylene which are unsubstituted or substituted by hydroxy; Ra and Rb each are independently hydrogen or C1-5-alkyl; R10 is carboxyl, C1-6-alkoxycarbonyl or mono- or di-(C1-6-alkyl)carbamoyl; and pharmaceutically acceptable salts of carboxylic acids of formula Ia.