(2S-(2alpha,5alpha,6beta))-3,3-Dimethyl-7-oxo-6-((phenylacetyl)amino)-4-thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid, compound with 1-ethylpiperidine (1:1) 39879-63-5 EINECS 254-670-6