5-羟基-[1,2,4]三唑并[1,5-a]嘧啶-7-醇

3-乙基己酸

diethyl 2-(3-methyl-1,2,4-thiadiazol-5-yl)propanedioate

diethyl 2-(3,4-dichloro-5-oxo-2,5-dihydro-furan-2-yl)-malonate

3,4-dichloro-2-ethoxy-2H-furan-5-one