CAS 1675244-99-1 2-[carboxy[(1H-tetrazol-1-ylacetyl)amino]methyl]-5-[[(5-methyl-1,3,4-thiadiazol-2-yl)sulfanyl]methyl]-5,6-dihydro-2H-1,3-thiazine-4-carboxylic acid (cefazoloic acid) (HCID 178718487)|化工社