Alternative definition : CRCH: Two (hydr)oxylated phenyl-propane (C6C3) monomers connected by the beta carbons
of the C3 chains to form a) diarylbutanes, and sometimes by additional other bonds
to form b) dihydronaphtalenes, c) tetrahydrofuranes, d) dioxabicyclooctanes. The building
blocks for lignin. (Boker, et al); NCI-GLOSS: A member of a group of substances found in plants that have shown estrogenic
and anticancer effects. Lignans have been used in some cultures to treat certain medical
problems.;