InChI=1S/C18H20O7S/c1-18-5-4-12-11(13(18)8-15(20)17(18)21)3-2-9-6-10(25-26(22,23)24)7-14(19)16(9)12/h6-7,11-13,19H,2-5,8H2,1H3,(H,22,23,24)/t11?,12?,13?,18-/m0/s1