Hydroxymatairesinol (HMR) is a lignan found in Norway spruce (Picea abies).

[1] It is an enterolactone precursor with anticancer activities.

[1] HMR's chemical structure is similar to matairesinol.

[2] At high concentrations, HMR has estrogenic properties, which are considerably weaker than those of estradiol.

This article about an organic compound is a stub.