1,2,3,4,6,11,12,12a-Octahydropyrazino(1,2-b)(2)benzazepine (E)-2-butenedioate (1:2) 58350-23-5 Pyrazino(1,2-b)(2)benzazepine, 1,2,3,4,6,11,12,12a-octahydro-, (E)-2-butenedioate (1:2)