aminodesacetoxy cephalosproanic acid (7-ADCA) is made from penicillin G via oxidation, ring enlargement rearrangement and fragmentation.

• 氨基-3-去乙酰氧基头孢烷酸(7-ADCA)是以青霉素G为原料,经氧化、扩环重排、裂解3步反应制得。