InChI=1S/C18H24O7S/c1-14(2)8-6-4-5-7-9-18(19)24-13-15-10-11-16(17(12-15)23-3)25-26(20,21)22/h6,8,10-12H,1,4-5,7,9,13H2,2-3H3,(H,20,21,22)/b8-6+