European Pharmacopoeia (EP) Reference Standard Synonym(s): Ethyl (12 RS ,13a SR ,13b SR )-13a-ethyl-12-hydroxy-2,3,5,6, 12,13,13a,13b-octahydro-1 H -indolo[3,2,1- de ]pyrido[3,2,1- ij ][1,5]naphthyridine-12-carboxylate; (±)-Ethyl 14-epivincaminate Empirical Formula:...