顺式-2,6-二甲基哌嗪

ethyl 4-acetyloxy-2-cyano-3-methylbut-2-enoate

methyl 2-(2-methyl-1,3-dioxolan-2-yl)acetate

1,1-二乙氧基丙酮

1,2-丙二醇-1-醋酸酯