InChI=1S/C19H20O6S/c20-17(12-8-14-4-2-1-3-5-14)19-18(24-19)13-9-15-6-10-16(11-7-15)25-26(21,22)23/h1-7,10-11,18-19H,8-9,12-13H2,(H,21,22,23)