(6-oxo-2-phenyl-1,3-thiazin-4-yl) acetate

(2E)-3-(4-氧代-4H-苯并吡喃-3-基)丙烯酸

5-hydroxy-2-oxo-N-thiobenzoyl-2H,5H-pyrano[3,2-c]chromene-3-carboxamide

5-(4-oxo-4H-chromen-3-yl)-2-phenyl-5,6-dihydro-4H,7H-pyrano[2,3-d][1,3]thiazine-4,7-dione

(2E)-3-(6-氯-4-氧代-4H-苯并吡喃-3-基)丙烯酸