Patent ID: 6239139
Filing Date: 2001-05-29
Classification: C07D

Abstract:
A compound of formula (1b) or a pharmaceutically acceptable salt thereof; ##STR31##whereinR.sup.1 and R.sup.2 which may be the same or different from each other, represent a hydroxy group or an alkoxy group having 1 to 4 carbon atoms or both R.sup.1 and R.sup.2 represent a methylenedioxy group;R.sup.3 represents an alkyl group having 1 to 8 carbon atoms, a ketonyl group having 3 to 7 carbon atoms, a branched ketonyl group, a cycloalkyl group having 3 to 7 carbon atoms, a cyanomethyl group, a 2-cyclopentanonyl group, or a 2-cyclohexanonyl group;R.sup.4 and R.sup.5 which may be the same or different from each other, represent a hydroxy group, a hydroxyethylamino group or an alkoxy group having 1to 4 carbon atoms;R.sup.6 represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, an alkenyl group having 3 to 8 carbon atoms, or a cycloalkylalkyl group having 3 to 7 carbon atoms.