(E)-4-氧代-4-(2,4,6-三甲基苯基)丁-2-烯酸

(Z)-4-oxo-4-(propan-2-ylamino)but-2-enoic acid

4-(4-methylphenoxy)-2-benzofuran-1,3-dione

(Z)-4-[4-[[4-[[(Z)-3-carboxyprop-2-enoyl]amino]phenyl]methyl]anilino]-4-oxobut-2-enoic acid

(2Z,4Z)-4-Hydroxy-5-methyl-hexa-2,4-diendisaeure-1,4-lacton