InChI=1S/C26H30O4/c1-18(2)6-5-7-19(3)8-14-23-25(30-4)17-15-22(26(23)29)24(28)16-11-20-9-12-21(27)13-10-20/h6,8-13,15-17,27,29H,5,7,14H2,1-4H3/b16-11+,19-8+