Griseofulvin - (1'S,6'R)-7-Chloro-2',4,6-trimethoxy-6'-methyl-spiro[benzofuran-2(3H),1'-[2]cyclohexene]-3,4'-dione; Spiro[benzofuran-2(3H),1'-[2]cyclohexene]-3,4'-dione, 7-chloro-2',4,6-trimethoxy-6'-methyl-, (1'S-trans)-; 7-Chloro-2′,4,6-trimethoxy-6′β-methylspiro[benzofuran-2(3H),1′-[2]cyclohexene]-3,4′-dione (USP);
Griseofulvin EP Impurity A - (1'S,6'R)-7-chloro-4,6-dimethoxy-6'-methyl-3H-spiro[1-benzofuran-2,1'-cyclohexane]-2',3,4'-trione ; trans-7-Chloro-4,6-dimethoxy-6'-methylspiro[benzofuran-2(3H),1'-cyclohexane]-2',3,4'-trione;
Griseofulvin EP Impurity B - (1'S-trans)-2',4,6-Trimethoxy-6'-methylspiro[benzofuran-2(3H),1'-[2]cyclohexene]-3,4'-dione;
Griseofulvin EP Impurity C - Dehydrogriseofulvin ; Griseofulvin - Impurity C ; (1'S)-7-Chloro-2',4,6-trimethoxy-6'-methylspiro[benzofuran-2(3H),1'-[2,5]cyclohexadiene]-3,4'-dione; (S)-7-chloro-2',4,6-trimethoxy-6'-methyl-3H-spiro[benzofuran-2,1'-cyclohexane]-2',5'-diene-3,4'-dione ;
