(2-oxochromen-4-yl) 4-methylbenzenesulfonate

异苯并吡喃并[4,3-c]苯并吡喃-6,11-二酮

(3Z)-3-[anilino(sulfanyl)methylidene]chromene-2,4-dione

4-hydroxy-N,N'-diphenylcoumarin-3-carboximidamide

2-oxochromene-4-carboxylic acid