The molecule is a flavonolignan isolated from Silybum marianum and has been shown to exhibit inhibitory activities against lipoxygenase and prostaglandin synthetase. It has a role as a radical scavenger, a lipoxygenase inhibitor, a prostaglandin antagonist and a metabolite. It is a flavonolignan, a member of 1-benzofurans, a polyphenol, an aromatic ether and a secondary alpha-hydroxy ketone.
(2R,3R)-3,5,7-trihydroxy-2-[(2R,3S)-7-hydroxy-2-(4-hydroxy-3-methoxyphenyl)-3-(hydroxymethyl)-2,3-dihydro-1-benzofuran-5-yl]-2,3-dihydrochromen-4-one