(3R-cis)-4-(3-(3-Ethyl-4-piperidinyl)propyl)quinoline (E)-2-butenedioate (2:3) 4(R)-(3-(4-Quinolyl)propyl) 3(R)-ethyl piperidine fumarate 65843-84-7 Quinoline, 4-(3-(ethyl-4-piperidinyl)propyl)-, (3R-cis)-, (E)-2-butenedioate (2:3)