4,4-二甲氧基丁酸甲酯

乙酰乙酸甲酯

3,3-bis(phenylmethoxymethyl)hept-5-ynal

3,3-bis(phenylmethoxymethyl)oct-5-ynal

dimethyl 2-but-1-ynyl-2-(2,2-dimethoxyethyl)propanedioate