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