4-imino-5,5,5-trimethoxypentan-2-one

dimethyl 2-hydroxy-4-methylbenzene-1,3-dicarboxylate

alpha,alpha,2-三甲基苄醇

2-(2,2-dioxooxathiolan-3-yl)propan-2-ol

2-氰基-3-甲基丁-2-烯酸