Synonyms: DPQ;3,4-DIHYDRO-5-[4-(1-PIPERIDINYL)BUTOXY]-1(2H)-ISOQUINOLINONE;3,4-DIHYDRO-5[4-(1-PIPERIDINYL)BUTOXYL]-1(2H)-ISOQUINOLINE;3,4-DIHYDRO-5-[4-(1-PIPERIDINYL)BUTOXYL]-1(2H)-ISOQUINOLINONE;3,4-DIHYDRO-5[4-(1-PIPERINDINYL)BUTOXY]-1(2H)-ISOQUINOLINE;5-[4-(1-PIPERIDINYL)-BUTYLOXY]-1,2,3,4-TETRAHYDROISOQUINOLIN-1-ONE