2-(4-Hydroxy-benzyl)-4-(4-hydroxy-benzyloxymethyl)-phenol 2-(4-hydroxybenzyl)-4-{[(4-hydroxybenzyl)oxy]methyl}phenol Gastrol InChI=1/C21H20O4/c22-19-6-1-15(2-7-19)11-18-12-17(5-10-21(18)24)14-25-13-16-3-8-20(23)9-4-16/h1-10,12,22-24H,11,13-14H phenol, 4-[[(4-hydroxyphenyl)methoxy]methyl]-2-[(4-hydroxyphenyl)methyl]-