Polyphenolic compounds with molecular weights of around 500-3000 daltons and containing enough hydroxyl groups (1-2 per 100 MW) for effective cross linking of other compounds (ASTRINGENTS).

Alpinumisoflavone has atheroprotective effects, may result from their ability to upregulate mechanisms promoting HDL-cholesterol and bile acid formation, it is endowed with estrogenic properties accounting, at least in part, for E. lysistemon effects.

Metamorphosin A