1,3,3-trimethylpyrrolidine-2,5-dione

2,2-二甲基琥珀酸酐

2-(3,3-dimethyl-2,5-dioxopyrrolidin-1-yl)benzoic acid

ethyl 4-chloro-3,3-dimethyl-4-oxobutanoate

3,3-二甲基吡咯烷盐酸盐