A compound of the formula ##STR1## wherein R.sub.1 is a C.sub.1-4 alkoxy, R.sub.2 is C.sub.1-4 alkyl and R.sub.3 is C.sub.1-4 alkylthio or pharmaceutically acceptable salts thereof. The compounds of the present invention exhibit excellent choleretic activity.
本发明的化合物具有以下公式:##STR1## 其中R.sub.1是C.sub.1-4烷氧基,R.sub.2是C.sub.1-4烷基,R.sub.3是C.sub.1-4烷基
硫醚或其药学上可接受的盐。本发明的化合物表现出优异的胆汁排泄作用。