Synonyms: 4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylicacid,6-[[(2R)-[[(4-hydroxy-1,5-naphthyridin-3-yl)carbonyl]amino]phenylacetyl]amino]-3,3-dimethyl-7-oxo-,(2S,5R,6R)- (9CI); 4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid,6-[[[[(4-hydroxy-1,5-naphthyridin-3-yl)carbonyl]amino]phenylacetyl]amino]-3,3-dimethyl-7-oxo-,[2S-[2a,5a,6b(S*)]]-; 1,5-Naphthyridine, 4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylicacid deriv.; Apalcillin