(6R,7R)-7-Amino-8-oxo-3-vinyl-5-thia-1-aza-bicyclo(4,2,0)oct-2-ene-2-carboxylic acid

It appears as a white to off-white crystalline powder, freely soluble in water, and serves as a key building block in the synthesis of semi-synthetic cephalosporins. (6R,7R)-7-Amino-8-oxo-3-vinyl-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid is the core β-lactam structure of cephalosporin antibiotics, often referred to as 7-aminocephalosporanic acid (7-ACA).

API Name Cefdinir
CAS No 79349-82-9
Molecular Formula C9H10N2O3S
Molecular Weight 226.25 g/mol
Synonyms (6R,7R)-7-amino-3-ethenyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid