3-Exomethylene Cephem (COMP-A, CA)

Chemical Name: Phenoxyacetamido-3-Exomethylene Cephem Sulfoxid p-Nitrobenzyl Ester.
Molecular formula: C₂₃H₂₁N₃O₈S
Exact Mass: 499.10
Molecular weight: 499.49
C, 55.31; H, 4.24; N, 8.41; O, 25.62; S, 6.42
Chemical structure:

Application: For Cefaclor, Cefdinir, Cefixime.