FOERFARANDE FOER FRAMSTAELLNING AV NYA ANALGETIC, ANTIFLOGISTIC AND ANTIPYRETIC 1,4,9,10-TETRAHYDROPYRAZOLO - / 4,3-E / PYRIDO / 3,2-B // 1,4 / DIAZEPIN-10-ONER.

摘要

This invention is directed to the compounds of the formula IMAGE (I) wherein R1 is hydrogen or an alkyl of from 1 to 6 carbon atoms; R2 is an alkyl of from 1 to 3 carbon atoms; R3 is hydrogen or an alkyl of from 1 to 3 carbon atoms; and R4 is hydrogen or an alkyl of from 1 to 4 carbon atoms. These compounds are useful in pharmaceutical compositions which serve as analgesics, antiphlogistics and antipyretics.