(6R,7R)-7-[[(Z)-2-(2-amino-1,3-thiazol-4-yl)-5-hydroxy-5-oxopent-2-enoyl]amino]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid (6R,7R)-7-[[(Z)-2-(2-aminothiazol-4-yl)-5-hydroxy-5-oxo-pent-2-enoyl]amino]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid (6R,7R)-7-[[(Z)-2-(2-amino-4-thiazolyl)-5-hydroxy-1,5-dioxopent-2-enyl]amino]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid (6R,7R)-7-[[(Z)-2-(2-aminothiazol-4-yl)-5-hydroxy-5-keto-pent-2-enoyl]amino]-8-keto-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid (6R,7R)-7-[[(Z)-2-(2-amino-1,3-thiazol-4-yl)-5-hydroxy-5-oxo-pent-2-enoyl]amino]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid 97519-39-6 Spectrum5_001558 Sch-39720 Keimax C08117 SPECTRUM1505207 7432-S Ceftem Ceprifran Isocef Ceftibuten (USAN/INN) BSPBio_002733 D00922