InChI=1S/C18H30O8S/c1-2-3-9-12-15(19)18(22)16(26-27(23,24)25)13-10-7-5-4-6-8-11-14-17(20)21/h3,9-10,13,16,19,22H,2,4-8,11-12,14H2,1H3,(H,20,21)(H,23,24,25)/b9-3-,13-10+,18-15?