(3Z)-4-(4-hydroxy-3-methoxybenzyl)-3-(4-hydroxy-3-methoxybenzylidene)dihydrofuran-2(3H)-one 2(3H)-furanone, dihydro-4-[(4-hydroxy-3-methoxyphenyl)methyl]-3-[(4-hydroxy-3-methoxyphenyl)methylene]-, (3Z)- InChI=1/C20H20O6/c1-24-18-9-12(3-5-16(18)21)7-14-11-26-20(23)15(14)8-13-4-6-17(22)19(10-13)25-2/h3-6,8-10,14,21-22H,7,11H2,1-2H3/b15-8