Synonyms: epsilon-viniferin;(-)-5-[[(2R)-2,3-Dihydro-6-hydroxy-2β-(4-hydroxyphenyl)-4-[(E)-2-(4-hydroxyphenyl)vinyl]benzofuran]-3α-yl]-1,3-benzenediol;(2R)-2β-(4-Hydroxyphenyl)-3α-(3,5-dihydroxyphenyl)-4-(4-hydroxy-trans-styryl)-2,3-dihydrobenzofuran-6-ol;(2R)-2β-(4-Hydroxyphenyl)-3α-(3,5-dihydroxyphenyl)-4-[(E)-4-hydroxystyryl]-2,3-dihydrobenzofuran-6-ol;[2R,(-)]-2β-(4-Hydroxyphenyl)-3α-(3,5-dihydroxyphenyl)-4-[(E)-2-(4-hydroxyphenyl)ethenyl]-2,3-dihydrobenzofuran-6-ol