InChI=1S/C18H22O7S/c1-18-7-6-11-10(12(18)4-5-14(18)19)3-2-9-8-13(25-26(22,23)24)16(20)17(21)15(9)11/h8,10-12,20-21H,2-7H2,1H3,(H,22,23,24)/t10?,11?,12?,18-/m0/s1