2-(3-醛基-4-羟基苯基)-4-甲基噻唑-5-羧酸乙酯

3-chloro-5,7-dihydroxy-4-methylchromen-2-one

2-(3-氰基-4-羟基苯基)-4-甲基-1,3-噻唑-5-羧酸乙酯

4-甲基-1,3-恶唑-5-甲酸乙酯

Ethyl 2-(4-chlorophenoxy)-3-oxobutanoate