ANTIDEPRESSANT AGENTS HAVING THE FORMULA (FORMULA. 1) 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 CAMP PHOSPHODIESTERASE INHIBITOR ANTIDEPRESSANT