1-(beta-(Diethylamino)phenethyl)-4-phenylisonipecotic acid ethyl ester maleate (1:2) 14735-87-6 ISONIPECOTIC ACID, 1-(beta-(DIETHYLAMINO)PHENETHYL)-4-PHENYL-, ETHYL ESTER, MALE Isonipecotic acid, 1-(beta-(diethylamino)phenethyl)-4-phenyl-, ethyl ester, maleate (1:2)