InChI=1S/C21H27NO4/c1-16(2)14-22-21(24)11-9-7-5-3-4-6-8-10-17-12-19-20(13-18(17)23)26-15-25-19/h5,7-13,16,23H,3-4,6,14-15H2,1-2H3,(H,22,24)/b7-5+,10-8+,11-9+