1-(methoxymethyl)-2,3,4,5-tetramethylbenzene

methyl 2-(5-oxopyrrolidin-2-ylidene)acetate

(E)-5-[(methoxycarbonyl)methylidene]-2-pyrrolidinone

2,3-dimethoxy-2,4-dimethyl-3H-1,4-benzoxazine

4-(methylideneamino)phenol