26309-95-5 33817-20-8 4-Thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid, 6-((aminophenylacetyl)amino)-3,3-dimethyl-7-oxo-, (2,2-dimethyl-1-oxopropoxy)methyl ester, (2S-(2alpha,5alpha,6beta(S*)))- 4-Thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid, 6-(2-amino-2-phenylacetamido)-3,3-dimethyl-7-oxo-, hydroxymethyl ester, pivalate (ester), D-(-)- Ampicillin pivaloyloxymethyl ester EINECS 251-688-6 MK 191 Pivaloylampicillin Pivaloyloxymethyl ampicillinate Pivampicilina [INN-Spanish] Pivampicillin Pivampicilline [INN-French] Pivampicillinum [INN-Latin]