InChI=1S/C14H18N2O7/c1-3-8-6(2)16-7(4-15-8)5-22-14-11(19)9(17)10(18)12(23-14)13(20)21/h3-4,9-12,14,17-19H,1,5H2,2H3,(H,20,21)