Aromatic heterocyclic derivatives have the formula ##STR1## wherein R.sub.1 represents ##STR2## wherein R.sub.3 represents hydrogen, --OR.sub.4 wherein R.sub.4 represents hydrogen, alkyl having 1-20 carbon atoms or mono- or polyhydroxyalkyl or R.sub.3 represents ##STR3## wherein r' and r" represent hydrogen, lower alkyl or together form a heterocycle, R.sub.2 represents hydrogen or --CH.sub.3 and Ar represents ##STR4## wherein Z is O or S, ##STR5## wherein R.sub.5 is lower alkyl or ##STR6## wherein R.sub.6 is hydrogen or alkyl having 1-10 carbon atoms and R.sub.7 represents alkyl having 4-12 carbon atoms or cycloalkyl, Y is CH or a nitrogen atom and X represents oxygen, sulfur or --N--R.sub.8 when R.sub.8 represents hydrogen, lower alkyl or lower alkoxycarbonyl, with the proviso that (i) when Y is CH and X is oxygen or sulfur Ar is other than C and (ii) when Y is nitrogen and X is oxygen, Ar is other than (C) or (D) in which R.sub.6 is alkyl having 1-4 carbon atoms and R.sub.7 is branched alkyl having 4-12 atoms useful in veterinary or human therapy and in cosmetic formulations.
芳香杂环衍
生物的
化学式为##STR1##其中R.sub.1代表##STR2##其中R.sub.3代表氢,--OR.sub.4,其中R.sub.4代表氢,1-20个碳原子的烷基或
单糖或
多糖基烷基,或R.sub.3代表##STR3##其中r'和r"代表氢,低烷基或共同形成杂环,R.sub.2代表氢或--CH.sub.3,Ar代表##STR4##其中Z为O或S,##STR5##其中R.sub.5为低烷基或##STR6##其中R.sub.6为氢或1-10个碳原子的烷基,R.sub.7代表4-12个碳原子的烷基或环烷基,Y为CH或氮原子,X代表氧、
硫或--N--R.sub.8,当R.sub.8代表氢、低烷基或低烷氧羰基时,前提是(i)当Y为CH且X为氧或
硫时,Ar不为C;(ii)当Y为氮且X为氧时,Ar不为(C)或(D),其中R.sub.6为1-4个碳原子的烷基,R.sub.7为有分支的4-12个原子,有用于兽医或人类疗法和化妆品配方。