 The enantiomer of the natural product is being studied as a potential painkiller.Hasubanonine is structurally related to the morphinan class of opioid analgesics.The enantioselective total synthesis of (–)-hasubanonine and related natural products, (−)-runanine, (−)-delavayine, and (+)-periglaucine B were first achieved by Prof. Seth Herzon and co-workers at Yale University in 2011.