Patent ID: 6132894
Filing Date: 2000-10-17
Classification: C09B

Abstract:
A compound according to the formula (I) ##STR12## or a mixture thereof whereinR.sub.1 is hydrogen, ##STR13## R.sub.2 is hydrogen, alkyl, alkoxyalkyl, cycloalkyl or aryl and R.sub.3 is alkyl, alkoxyalkyl, cycloalkyl or arylR.sub.4 is H or OHR.sub.5 is hydrogen, alkyl, alkoxyalkyl or cycloalkylor R.sub.1 and R.sub.5 together with the ring to which they are attached form a naphthyl group,R.sub.6 is hydrogen or a group ##STR14## R.sub.7 is a protonated aliphatic or cycloaliphatic amine or piperidinium with the proviso that(i) when R.sub.1 and R.sub.5 together with the ring to which they are attached form a naphthyl group then R.sub.4 is hydrogen and R.sub.6 is hydrogen, and(ii) R.sub.4 is OH when R.sub.1 is hydrogen, ##STR15## and R.sub.5 is hydrogen, alkyl, alkoxyalkyl and cycloalkyl.