The chemical Cefaclor has a designated molecular formula of C15H14ClN3O4S and a molecular weight of 367.804 g/mol. Synonyms may include: S 6472, Cefaclorum [INN-Latin], Cephaclor, 3-Chloro-7-D-(2-phenylglycinamido)-3-cephem-4-carboxylic acid, EINECS 258-909-5, Kefral, Lilly 99638, Panoral, (6R,7R)-7-((R)-2-Amino-2-phenylacetamido)-3-chloro-8-oxo-5-thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid, Ceclor, Ceclor CD, Raniclor (ChemID). Cefaclor has been assigned a MeSH pharmacological action of: Antibacterial.