InChI=1S/C27H32O4/c1-18(12-14-24-19(2)8-7-15-27(24,4)5)11-13-23(20(3)16-25(28)29)21-9-6-10-22(17-21)26(30)31/h6,9-14,16-17H,7-8,15H2,1-5H3,(H,28,29)(H,30,31)/b14-12+,18-11+,20-16-,23-13-