PROCESS FOR OBTAINING DERIVATIVES OF PYROLIDYNONE AS CALCIUM INDEPENDENT CAMP INHIBITORS OF PHOSPHODIESTHERAZE

摘要

Antidepressant agents having the formula CHEM wherein R1 is a polycycloalkyl group; R2 is methyl or ethyl, X is O or NH; and Y comprises a 5- or 6-membered heterocyclic ring having one or two nitrogens; or fused bicyclic heterocyclic rings having a total of three nitrogen atoms, one in each ring and one angular nitrogen.