Synonyms: Ephedrine penicillin;Penicillin G ephedrine salt;Tersavin;4-Thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid, 3,3-dimethyl-7-oxo-6- (2-phenylacetamido)-, compd with ephedrine (1:1);4-Thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid, 3,3-dimethyl-7-oxo-6-((phenylacetyl)amino)- (2S-(2alpha,5alpha,6beta))-, compd.with (R-(R*,S*))-alpha-(1-(methylamino)ethyl)benzenemethanol (1:1 );(2S,5R,6R)-3,3-dimethyl-7-oxo-6-[(phenylacetyl)amino]-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid - (1R,2S)-2-(methylamino)-1-phenylpropan-1-ol (1:1)