InChI=1S/C19H14O6S/c20-18-14(25-26(21,22)23)8-11-9-15-19(24-15)13-7-6-12(17(18)16(11)13)10-4-2-1-3-5-10/h1-7,9,14-15,19H,8H2,(H,21,22,23)