3,8-dimethylidene-2,7-dioxaspiro[4.4]nonane-1,6-dione

1,5,5-三烯丙基巴比妥酸

2-(hydroxymethyl)-2-prop-2-enylpent-4-enal

diethyl cyclopent-2-ene-1,1-dicarboxylate

丙戊酸相关物质A