InChI=1S/C20H28O6S/c1-15(10-11-18-16(2)8-6-12-20(18,3)4)7-5-9-17(13-19(21)22)14-26-27(23,24)25/h5,7,9-11,13H,6,8,12,14H2,1-4H3,(H,21,22)(H,23,24,25)/b9-5+,11-10+,15-7+,17-13-