3-methoxy-2-phenyl-4H-thiochromeno[7,8-b]furan-4-one 4H-thiopyrano[2,3-e]benzofuran-4-one, 3-methoxy-2-phenyl- InChI=1/C18H12O3S/c1-20-16-15(19)13-7-8-14-12(9-10-21-14)18(13)22-17(16)11-5-3-2-4-6-11/h2-10H,1H