European Pharmacopoeia (EP) Reference Standard Synonym(s): Methyl (13a S ,13b S )-13a-ethyl-2,3,5,6,13a,13b-hexahydro-1 H -indolo[3,2,1- de ]pyrido[3,2,1- ij ][1,5]naphthyridine-12-carboxylate; Apovincamine Empirical Formula: C21H24N2O2 Formula Weight:...