InChI=1S/C18H17NO11S/c1-28-14-8-11(10(18(23)24)7-12(14)20)19-16(22)4-3-9-5-13(21)17(15(6-9)29-2)30-31(25,26)27/h3-8,20-21H,1-2H3,(H,19,22)(H,23,24)(H,25,26,27)