2H-1-benzopyran-2-one, 3-[2,4-dihydroxy-3-(3-methyl-2-butenyl)phenyl]-7-hydroxy-8-(3-methyl-2-butenyl)- 3-[2,4-dihydroxy-3-(3-methylbut-2-en-1-yl)phenyl]-7-hydroxy-8-(3-methylbut-2-en-1-yl)-2H-chromen-2-one InChI=1/C25H26O5/c1-14(2)5-8-18-21(26)12-10-17(23(18)28)20-13-16-7-11-22(27)19(9-6-15(3)4)24(16)30-25(20)29/h5-7,10-13,26-28H,8-9H2,1-4H