(Pivaloyloxy)methyl (6R-(6alpha,7beta(R*)))-7-(2-amino-2-phenylacetamido)-3-methyl-8-oxo-5-thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylate monohydrochloride 27726-31-4 5-Thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid, 7-(2-amino-2-phenylacetamido)-3-methyl-8-oxo-, pivaloyloxymethyl ester, hydrochloride, D- EINECS 248-622-3 Pivcefalexin hydrochloride Pivcefalexina [Spanish] Pivcephalexin ST-21 Sigmacef