InChI=1S/C23H35NO5/c25-18-13-11-9-7-5-3-1-2-4-6-8-10-12-15-19-16-14-17-20(26)21(19)22(27)24-23(28)29/h1,3,14,16-17,25-26H,2,4-13,15,18H2,(H,24,27)(H,28,29)/b3-1+