VitSin A; VitSin A (VitS coignetiae); 6-[5-[2-[3-(3,5-Dihydroxyphenyl)-2,3-dihydro-6-hydroxy-2-(4-hydroxyphenyl)-4-benzofuranyl]ethenyl]-2-hydroxyphenyl]-1,6,7,11b-tetrahydro-1,7-bS(4-hydroxyphenyl)benzo[6,7]cyclohepta[1,2,3-cd]benzofuran-4,8,10-triol; (S,6R,S,11S)-6-[5-[(1E)-2-[(S,S)-3-(3,5-Dihydroxyphenyl)-2,3-dihydro-6-hydroxy-2-(4-hydroxyphenyl)-4-benzofuranyl]ethenyl]-2-hydroxyphenyl]-1,6,7,11b-tetrahydro-1,7-bS(4-hydroxyphenyl)benzo[6,7]cyclohepta[1,2,3-cd]benzofuran-4,8,10-triol