3-[ethoxy(phenyl)methyl]-4H-thiochromen-4-one 4H-1-benzothiopyran-4-one, 3-(ethoxyphenylmethyl)- InChI=1/C18H16O2S/c1-2-20-18(13-8-4-3-5-9-13)15-12-21-16-11-7-6-10-14(16)17(15)19/h3-12,18H,2H2,1H