A potent, selective long-acting β2 adrenoceptor agonist with EC50 of 1.4 nM for hβ2; shows >250 fold selectivity over hβ1; exerts a bronchodilatory efficacy over 24 h in dogs and guinea pigs in the absence of systemic pharmacodynamic effects.COPDPhase 3 Clinical

BRL 37344 is a potent and selective β3 adrenoceptor agonist with Ki of 287 nM; has weaker binding affinity for β1 and β2 receptors with Ki of 1750 and 1120 nM, respectively.

Dihydrochelerythrine is nontoxic up to 5μM concentration. Dihydrochelerythrine has antifungal activity against pathogenic plant fungi.