InChI=1S/C14H18N2O5/c15-11(5-8-1-3-9(17)4-2-8)13(19)16-7-10(18)6-12(16)14(20)21/h1-4,10-12,17-18H,5-7,15H2,(H,20,21)/t10-,11+,12+/m1/s1