InChI=1S/C20H28O7S/c1-25-17-9-12-3-4-14-13(15(12)10-18(17)26-2)7-8-20(11-27-28(22,23)24)16(14)5-6-19(20)21/h9-10,13-14,16,19,21H,3-8,11H2,1-2H3,(H,22,23,24)/t13?,14?,16?,19?,20-/m1/s1