InChI=1S/C18H20O7S/c19-11-2-4-12-10(7-11)1-3-14-13(12)5-6-18(9-25-26(22,23)24)15(14)8-16(20)17(18)21/h2,4,7,13-15,19H,1,3,5-6,8-9H2,(H,22,23,24)/t13?,14?,15?,18-/m1/s1