3,3-dimethyl-5,6,7-tris(carbomethoxy)-2(3H)benzofuranon

乙基5-甲基-4-氧代己酸酯

2,5-二甲基-3-己炔-2,5-二醇

4-hydroxy-4-methyl-pent-2-ynoic acid methyl ester

4-(3-羟基-3-甲基-1-丁炔)-苯甲醛