InChI=1S/C20H28O5S/c1-15(7-6-8-16(2)12-14-21)9-10-18-17(3)19(25-26(22,23)24)11-13-20(18,4)5/h6-10,12,14,19H,11,13H2,1-5H3,(H,22,23,24)/b8-6+,10-9+,15-7+,16-12+