InChI=1S/C19H20O4S2/c1-13(2)11-19(21)22-12-15(23-14(3)20)6-7-16-8-9-18(25-16)17-5-4-10-24-17/h4-5,8-10,13,15H,11-12H2,1-3H3/t15-/m1/s1