InChI=1S/C21H27N3O4/c1-12-15-10-22-19(23-16-7-8-28-11-18(16)26)9-17(15)24(14-5-3-4-6-14)21(27)20(12)13(2)25/h9-10,14,16,18,26H,3-8,11H2,1-2H3,(H,22,23)/t16-,18+/m1/s1