InChI=1S/C22H31NO4/c1-17(2)15-23-22(25)19(24)11-9-7-5-3-4-6-8-10-18-12-13-20-21(14-18)27-16-26-20/h7-10,12-14,17,19,24H,3-6,11,15-16H2,1-2H3,(H,23,25)/b9-7+,10-8+