Antidepressant agents having the formula <IMAGE> 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.
CALCIUM INDEPENDENT C AMP PHOSPHODIESTERASE INHIBITOR ANTIDEPRESSANT