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