(2,5-Dihydro-2,5-dioxofur-3-yl)acetic acid3-(Carboxymethyl)-2,5-dihydro-2,5-dioxofurancis-Aconitic anhydride , cis-Prop-1-ene-1,2,3-tricarboxylic anhydridecis-Propene-1,2,3-tricarboxylic anhydride顺-3-羧基戊烯二酸酐cis-Aconitic anhydride顺式乌头酸酐cis-ACONITIC ANHYDRIDEPropene-1,2,3-tricarboxylic anhydride顺-乌头酸酐2,5-Dihydro-2,5-dioxofuran-3-acetic acid