Cefdinir Decarboxy Open Ring Lactone Impurity

Chemical Name: (Z)-2-(2-Aminothiazol-4-yl)-2-(hydroxyimino)-N-{[(2RS,5RS)-5-methyl-7-oxo-2,4,5,7-tetrahydro-1H-furo[3,4-d][1,3]thiazin-2-yl]methyl}acetamide ;

Smile: O/N=C(C(NCC1SCC(C(C)OC2=O)=C2N1)=O)/C3=CSC(N)=N3