InChI=1S/C20H28O6S/c1-15(13-19(21)22)7-5-9-17(14-26-27(23,24)25)10-11-18-16(2)8-6-12-20(18,3)4/h5,7,9-11,13H,6,8,12,14H2,1-4H3,(H,21,22)(H,23,24,25)/b7-5+,11-10+,15-13+,17-9-