InChI=1/C21H26N2O4/c1-21(2,3)19(15-7-5-4-6-8-15)23-20(24)22-11-12-25-16-9-10-17-18(13-16)27-14-26-17/h4-10,13,19H,11-12,14H2,1-3H3,(H2,22,23,24)/t19-/m0/s1/f/h22-23H 7C6613D3F7DB3432