[Chemical Name]  Biapenem,

6-[[(4R,5S,6S)-2-Carboxy-6-[(1R)-1-hydroxyethyl]-4-methyl-7-oxo-1-azabicyclo[3.2.0]hept-2-en-3-yl]thio]-6,7-dihydro-5H-pyrazolo[1,2-a][1,2,4]triazol-4-ium inner salt

 [Molecular Formula]  C₁₅H₁₈N₄O₄S

 [Molecular Weight]   350.39

 [CAS No.]  120410-24-4