InChI=1S/C18H22O7S/c19-15-7-10-1-2-12-11(13(10)8-16(15)20)5-6-18(9-25-26(22,23)24)14(12)3-4-17(18)21/h7-8,11-12,14,19-20H,1-6,9H2,(H,22,23,24)/t11?,12?,14?,18-/m1/s1