InChI=1S/C19H18O6S/c1-4-5-13-6-8-16-15(10-13)12(2)19(24-16)14-7-9-17(18(11-14)23-3)25-26(20,21)22/h4-11,19H,2H2,1,3H3,(H,20,21,22)