2-乙基-2-甲基丁二酸

4-ethyl-1-(4-methoxybenzyl)-4-methylpyrrolidine-2,5-dione

2-甲基丁醛

4-ethyl-5-hydroxy-1-(4-methoxybenzyl)-4-methylpyrrolidin-2-one

4-ethyl-5-hydroxy-1-(4-methoxybenzyl)-4-methyl-3-(methylthio)pyrrolidin-2-one