InChI=1S/C19H18O6S/c1-12(2)6-9-16-15(4-3-5-17(16)25-26(21,22)23)19-10-13-7-8-14(20)11-18(13)24-19/h3-8,10-11,20H,9H2,1-2H3,(H,21,22,23)