InChI=1S/C19H20O5S/c20-18(14-13-16-7-2-1-3-8-16)11-5-4-9-17-10-6-12-19(15-17)24-25(21,22)23/h1-3,5-8,10-12,15H,4,9,13-14H2,(H,21,22,23)