| 摘要 |
of tho Disclosure: This invention is directed to pyrrolidones prepared by a multistep process and useful as spasmogcnic and spasmolytic agents, for example with a bronchidilatatory and antihypertensive activity, and which are able to inhibit the secretion of gastric juice and have abortive effects. The compounds of the invention have the formula I wherein Rl represents a straight-chained or branched alkyl group of 1 to 7 carbon atoms, which may be substituted by alkoxy of 1 to 3 carbon atoms; R2 represents lower alkyl; R3 represents lower alkyl, lower alkenyl, lower alkinyl or an araliphatic hydrocarbon radical having 7 or 8 carbon atoms; and n represents the integers two, three or four. |
