InChI=1S/C23H33NO4/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-16-19-17-15-18-20(25)21(19)22(26)24-23(27)28/h2,7-8,15,17-18,25H,1,3-6,9-14,16H2,(H,24,26)(H,27,28)/b8-7+