Synonyms: BLP 875;6-(R-alpha-Amino-3-thienylacetamido)penicillanic acid;4-Thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid, 6-((amino-3-thienylacetyl)amino)-3-methylene-7-oxo-, (2S-(2-alpha,5-alpha,6-beta(S*)))-, trihydrate;AC1MILD4;LS-149734;(2R,5R,6R)-6-[(2-amino-2-thiophen-3-ylacetyl)amino]-3-methylidene-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid;63504-05-2