2-[(8-bromo-7-hydroxy-5-methoxy-2-methyl-4-thioxo-4H-benzopyran-6-ylmethylene)-hydrazono]-3-ethyl-thiazolidin-4-one

(5E)-5-benzylidene-1,3-thiazolidine-2,4-dione

1-ethyl-3-(4-methylphenyl)thiourea

氯乙酸