InChI=1S/C21H27NO5/c1-2-3-4-5-17-15(8-11-19(17)24)13-20(25)22-18(21(26)27)12-14-6-9-16(23)10-7-14/h3-4,6-7,9-10,15,17-18,23H,2,5,8,11-13H2,1H3,(H,22,25)(H,26,27)/b4-3+