InChI=1S/C21H29NO4/c1-16(2)14-22-21(24)10-6-5-9-18(23)8-4-3-7-17-11-12-19-20(13-17)26-15-25-19/h3,5,7,9,11-13,16,18,23H,4,6,8,10,14-15H2,1-2H3,(H,22,24)/b7-3+,9-5+