InChI=1S/C19H22O7S/c20-16(9-6-14-4-2-1-3-5-14)13-19(22)18(21)12-15-7-10-17(11-8-15)26-27(23,24)25/h1-5,7-8,10-11,18-19,21-22H,6,9,12-13H2,(H,23,24,25)