5-hydroxy-9-chloro-2-oxo-N-thiobenzoyl-2H,5H-pyrano[3,2-c]chromene-3-carboxamide

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