InChI=1S/C19H20O7S/c1-3-4-12-5-7-16-14(9-12)15(11-20)19(25-16)13-6-8-17(18(10-13)24-2)26-27(21,22)23/h3-10,15,19-20H,11H2,1-2H3,(H,21,22,23)