Vam3 (Amurensin H), a resveratrol dimer, was isolated from ethanol extracts of Vitis amurensis Rupr. The levels of Vam3 insides most plants are low. Some mature synthetic routes for Vam3 have been achieved. The previous in vivo and in vitro studies have found that Vam3 had anti-asthmatic effects and anti-COPD effects. Chronic obstructive pulmonary disease (COPD) is characterized by progressive, partially reversible airflow obstruction associated with abnormal airway inflammation and oxidant/antioxidant imba...