InChI=1S/C26H28O6/c1-15(2)6-5-7-16(3)8-10-18-20(28)13-21(29)25-22(30)14-23(32-26(18)25)17-9-11-19(27)24(12-17)31-4/h6,8-9,11-14,27-29H,5,7,10H2,1-4H3/b16-8+