InChI=1S/C18H19N3O7/c19-13(17(23)24)8-11-3-6-16(15(9-11)21(26)27)28-18(25)14(20)7-10-1-4-12(22)5-2-10/h1-6,9,13-14,22H,7-8,19-20H2,(H,23,24)