InChI=1S/C12H15NO6/c14-8-5-19-11(10(16)9(8)15)13-7-3-1-6(2-4-7)12(17)18/h1-4,8-11,13-16H,5H2,(H,17,18)/t8-,9+,10-,11?/m1/s1