2H-1-benzopyran-7-ol, 6-(1,1-dimethyl-2-propenyl)-3-(4-hydroxy-2-methoxyphenyl)- 6-(1,1-Dimethyl-allyl)-3-(4-hydroxy-2-methoxy-phenyl)-2H-chromen-7-ol 6-(1,1-dimethylprop-2-en-1-yl)-3-(4-hydroxy-2-methoxyphenyl)-2H-chromen-7-ol 7,4'-Dihydroxy-2'-methoxy-6-(1'',1''-dimethylallyl)isoflav-3-ene Burttinol A InChI=1/C21H22O4/c1-5-21(2,3)17-9-13-8-14(12-25-19(13)11-18(17)23)16-7-6-15(22)10-20(16)24-4/h5-11,22-23H,1,12H2,2-4H