2-(3,4-Diethoxy beta-methoxyphenethyl)imino-1-methylpyrrolidine fumarate 40665-49-4 Benzeneethanamine, 3,4-diethoxy beta-methoxy-N-(1-methyl-2-pyrrolidinylidene)-, (E)-2-butenedioate (1:1) Mcn 2840-46