InChI=1S/C11H12O10S2/c12-11-2-1-8(19-11)3-7-4-9(20-22(13,14)15)6-10(5-7)21-23(16,17)18/h4-6,8H,1-3H2,(H,13,14,15)(H,16,17,18)/t8-/m1/s1