InChI=1S/C19H22O5S/c20-18-13-10-17(11-14-18)8-4-5-9-19(24-25(21,22)23)15-12-16-6-2-1-3-7-16/h1-3,5-7,9-11,13-14,19-20H,4,8,12,15H2,(H,21,22,23)/b9-5+