InChI=1/C21H24N2O4/c1-15-13-23(14-20(27-15)17-5-3-2-4-6-17)21(24)22-12-16-7-8-18-19(11-16)26-10-9-25-18/h2-8,11,15,20H,9-10,12-14H2,1H3,(H,22,24)/t15-,20-/m1/s1/f/h22H 85A56EF74E67E12B