39030-72-3 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-((2 alpha, 5 alpha, 6 beta(S*))))-, 4,4'-methylenebis(3-hydroxy-2-naphthalenecarboxylate) (2:1) Pivampicillin pamoate Pivampicillin pamoate [USAN]