InChI=1S/C21H22N2O3/c1-3-12-10-23-17-9-15(12)21(11-24,20(25)26-2)18(23)8-14-13-6-4-5-7-16(13)22-19(14)17/h3-7,11,15,17-18,22H,8-10H2,1-2H3