InChI=1/C21H28N2O4/c24-21(22-9-3-10-25-14-17-7-8-17)23-13-18-4-1-5-19(12-18)15-26-16-20-6-2-11-27-20/h1-2,4-6,11-12,17H,3,7-10,13-16H2,(H2,22,23,24)/f/h22-23H 5D872241DFB15F52