InChI=1S/C23H31NO4/c1-15(2)7-5-8-16(3)9-6-10-17(4)11-12-28-22-20(25)13-18-19(21(22)26)14-24-23(18)27/h7,9,11,13,25-26H,5-6,8,10,12,14H2,1-4H3,(H,24,27)/b16-9+,17-11+