InChI=1/C21H23N3O3/c25-20(23-27)12-7-16-3-5-17(6-4-16)15-22-21(26)18-8-10-19(11-9-18)24-13-1-2-14-24/h3-12,27H,1-2,13-15H2,(H,22,26)(H,23,25)/b12-7+/f/h22-23H A077051B45A73A8D