InChI=1S/C21H29NO4/c1-16(2)14-22-21(24)8-6-4-3-5-7-18(23)11-9-17-10-12-19-20(13-17)26-15-25-19/h3-4,9-13,16,18,23H,5-8,14-15H2,1-2H3,(H,22,24)/b4-3+,11-9+