InChI=1S/C23H28O5/c1-17(9-6-10-18(2)14-15-21(24)25)11-7-13-20-23(4,28-20)16-8-12-19(3)22(26)27-5/h6-16,20H,1-5H3,(H,24,25)/b9-6+,13-7+,15-14+,16-8+,17-11+,18-10+,19-12+