78364-23-5
(E)-4-methoxymethylene-3,4-dihydro-1H-2-benzopyran-1,3-dione
→
~82%
78364-07-5
(4E)-4-(aminomethylidene)isochromene-1,3-dione
703-59-3
邻苯二价酸酐
89-51-0
邻羧基苯乙酸