InChI=1S/C15H20N2O6/c1-3-8(2)12(15(22)23)16-5-4-9-6-10(13(18)19)17-11(7-9)14(20)21/h4-6,8,11-12,17H,3,7H2,1-2H3,(H,18,19)(H,20,21)(H,22,23)/b9-4-,16-5?/t8?,11-,12?/m0/s1