| abstract |
Phthalazine cardiac stimulants of the formulan wherein R 1 is a C 1 -C 4 alkyl group, and Y is a group of the formula: -(CH 2 ) m -Z, wherein m is 1 or 2, and Z is a group selected from:n n n n n andn wherein R 2 and R 4 are each independently hydrogen or C,-C 4 alkyl, nand R 3 is C 3 -C 7 cycloalkyl; nor a pharmaceutically acceptable acid addition salt thereof; n Also described are processes for preparing the compounds and pharmaceutical compositions containing them. |