Patent ID: 6124351
Filing Date: 2000-09-26
Classification: C07C,C07D

Abstract:
A compound represented by the general formula (I): ##STR29## (where R.sub.1, denotes a hydrogen atom, a straight-chained or branched alkoxycarbonyl group having 1-6 carbon atoms in which the alkyl portion may optionally have a substituent, or an optionally substituted straight-chained or branched acyl group having 1-9 carbon atoms;R.sub.2 denotes a hydrogen atom or an optionally substituted straight-chained or branched alkyl group having 1-6 carbon atoms;R.sub.3 denotes an optionally substituted straight-chained or branched alkyl group having 1-6 carbon atoms or an optionally substituted straight-chained or branched alkenyl group having 2-6 carbon atoms;R.sub.4 denotes a hydrogen atom;or alternatively R.sub.3 and R4 may combine together to form an optionally substituted 5- to 7-membered ring; andn denotes an integer of 2-4, provided that when R.sub.3 is a methyl group, n is not 3 at the same time) or a pharmaceutically acceptable salt thereof with the proviso that compounds having the formula (I) where R.sub.1 and R.sub.2 are each a hydrogen atom, R.sub.3 is a straight-chained or branched alkyl group having 1-5 carbon atoms, R.sub.4 is a hydrogen atom and n is an integer of 3 or 4 are excluded.