InChI=1S/C22H27NO3/c1-18(2)16-23-22(24)12-10-8-6-4-3-5-7-9-11-19-13-14-20-21(15-19)26-17-25-20/h6,8-15H,1,3-5,7,16-17H2,2H3,(H,23,24)/b8-6+,11-9+,12-10+