CAS No:42947-69-3||Chemical Formula:C19H19Cl2N3O6S||Molecular Weight:488.33600||Exact Mass:487.03716 ||(4S)-2-[carboxy[[[3-(2,6-dichlorophenyl)-5-methyl-1,2-oxazol-4-yl]carbonyl]amino]methyl]-5,5-dimethyl-1,3-thiazolidine-4-carboxylic acid (penicilloic acids of dicloxacillin)