InChI=1S/C20H23N3O7/c1-9-7-12(23-20(21-9)22-10-5-3-2-4-6-10)11-8-13(11)29-19-16(26)14(24)15(25)17(30-19)18(27)28/h2-7,11,13-17,19,24-26H,8H2,1H3,(H,27,28)(H,21,22,23)