3-iodo-2-(iodomethyl)propanoic acid

diethyl 1,3-dioxane-5,5-dicarboxylate

diethyl 2-methyl-1,3-dioxane-5,5-dicarboxylate

2,2-二甲基-[1,3]二恶烷-5,5-二甲酸二乙酯

1-苄基氮杂丁烷-3,3-二羧酸二乙酯