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 2-(diethylamino)ethyl 4-aminobezoate (1:1), mixt. with (2S-(2alpha,5alpha,6beta))-3,3-dimethyl-7-oxo-6-((phenylacetyl)amino)-4-thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid 57607-41-7 Jenicillin A