abstract |
PURPOSE: Tyrosinol derivatives of formula I [where R 1 is substituted of unsubstituted phenyl or cycloalkyl; R 2 is H or lower alkyl; A is single bond, -CH 2 O-or formula II (where R 4 is lower alkyl),however when R 1 is unsubstituted phenyl and besides A is single bond or-CH 2 O-,R 2 is lower alkyl] are new. n COPYRIGHT: (C)1976,JPO&Japio |