There are provided compounds of the formula: ##STR1## wherein R.sub.1 is a hydrogen or C.sub.1 -C.sub.5 alkyl; R.sub.2 is an C.sub.1 -C.sub.10 alkyl, aryl, aralkyl, or pyridyl, where the aryl, aralkyl, or pyridyl are unsubstituted or are substituted by C.sub.1 -C.sub.5 alkyl, C.sub.1 -C.sub.5 alkoxy, nitro, hydroxy, carboxy, amino, C.sub.1 -C.sub.5 alkylamino, C.sub.1 -C.sub.5 dialkylamino whose two alkyl groups may be different from each other, C.sub.2 -C.sub.3 alkanoylamino, or halogen and X is an C.sub.1 -C.sub.7 alkylene, C.sub.2 -C.sub.7 alkenylene, --CH(F)CH.dbd.CH(CH.sub.2).sub.3 --, --(CH.sub.2).sub.3 --S--(CH.sub.2).sub.2 --, --CH.sub.2).sub.2 --S--(CH.sub.2).sub.3 --, --C.sub.6 H.sub.4 --O--CH.sub.2 --or --CH.sub.2 CH.dbd.CH--m--C.sub.6 H.sub.4 --, or their pharmaceutically acceptable salts. The compounds are useful as antithrombotic, anti-vasoconstricting and anti-bronchoconstricting drugs.
提供了以下化合物的公式:##STR1##其中R.sub.1是氢或C.sub.1-C.sub.5烷基;R.sub.2是C.sub.1-C.sub.10烷基,芳基,芳基烷基或
吡啶基,其中芳基,芳基烷基或
吡啶基未取代或被C.sub.1-C.sub.5烷基,C.sub.1-C.sub.5烷氧基,硝基,羟基,羧基,
氨基,C.sub.1-C.sub.5烷基
氨基,C.sub.1-C.sub.5二烷基
氨基(其两个烷基可能不同),C.sub.2-C.sub.3烷酰胺基,或卤素取代;X是C.sub.1-C.sub.7烷基,C.sub.2-C.sub.7烯基,--CH(F)CH.dbd.CH(CH.sub.2).sub.3 --,--(CH.sub.2).sub.3 --S--(CH.sub.2).sub.2 --,--CH.sub.2).sub.2 --S--(CH.sub.2).sub.3 --,--C.sub.6 H.sub.4 --O--CH.sub.2 --或--CH.sub.2 CH.dbd.CH--m--C.sub.6 H.sub.4 --,或其药学上可接受的盐。这些化合物可用作抗血栓、抗血管收缩和抗支气管收缩药物。