InChI=1S/C23H28O5/c1-16(10-8-12-19(4)23(26)27-5)9-6-7-11-18(3)22-20(28-22)15-17(2)13-14-21(24)25/h6-15,20,22H,1-5H3,(H,24,25)/b7-6+,10-8+,14-13+,16-9+,17-15+,18-11+,19-12+