英文名称
Methyl 3-methyl-7-methylidene-5,5,8-trioxo-4-propan-2-ylidene-5lambda6-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate;methyl 3-methyl-5,5,8-trioxo-4,7-di(propan-2-ylidene)-5lambda6-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate;methyl 3-methyl-5,5,8-trioxo-7-propan-2-ylidene-5lambda6-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate