(+)-3r-N-Monomethylamino-4c-phenyl-4t-ethoxycarbonylcyclohexene-1, d-dibenzoyl-d-tartrate (+)-Nortilidine compd. with (+)-dibenzoyltartaric acid 3-Cyclohexene-1-carboxylic acid, 2-(methylamino)-1-phenyl-, ethyl ester, trans-(+)-, compd. with (S-(R*,R*))-2,3-bis(benzoyloxy)butanedioic acid GW4562499