InChI=1S/C25H28O6/c1-15(2)8-9-27-20-6-4-16(10-22(20)26-3)24-18-12-29-25(19(18)13-28-24)17-5-7-21-23(11-17)31-14-30-21/h4-11,15,18-19,24-25H,12-14H2,1-3H3/b9-8-