2(3H)-Furanone,dihydro-3-[[4-[2-hydroxy-2-(4-hydroxy-3-methoxyphenyl)-1-(hydroxymethyl)ethoxy]-3-methoxyphenyl]methyl]-4-[(4-hydroxy-3-methoxyphenyl)methyl]-,(3R,4R)-;2(3H)-Furanone,dihydro-3-[[4-[2-hydroxy-2-(4-hydroxy-3-methoxyphenyl)-1-(hydroxymethyl)ethoxy]-3-methoxyphenyl]methyl]-4-[(4-;2(3H)-Furanone,dihydro-3-[[4-[2-hydroxy-2-(4-hydroxy-3-methoxyphenyl)-1-(hydroxymethyl)ethoxy]-3-methoxyphenyl]methyl]-4-[(4-hydroxy-3-methoxyphenyl)methyl]-;Arctignan A