InChI=1S/C21H21N3O5/c25-16(12-24-20(27)17-3-1-2-4-18(17)21(24)28)11-22-14-5-7-15(8-6-14)23-9-10-29-13-19(23)26/h1-8,16,22,25H,9-13H2