1 LBU Methyl (2s)-4-hydroxy-3-(4-hydroxyphenyl)-2-[(4-hydroxyphenyl)methyl]-5-oxo-2,5-dihydrofuran-2-carboxylate 1.000 2 XBU Methyl (2~{R})-3-(4-hydroxyphenyl)-2-[(4-hydroxyphenyl)methyl]-4-oxidanyl-5-oxidanylidene-furan-2-carboxylate 1.000 3 E7C Methyl (2r)-3-(4-hydroxyphenyl)-2-[[3-(3-methylbut-2-enyl)-4-oxidanyl-phenyl]methyl]-4-oxidanyl-5-oxidanylidene-furan-2-carboxylate 0.839