Northebaine Hydrochloride is an intermediate in the synthesis of R(-)-2-Hydroxy-N-propylnorapomorphine Hydrobromide Salt (R701253), which is a potent and selective D2 dopamine receptor agonist (2). The dopamine receptors play important role in cognition, memory, learning, and motor control (1). These receptors have been implicated as a therapeutic target for many psychiatric and neurological disorders. Molecular Formula: C18H19NO3 ? (HCl) Molecular Weight: 297.35364600000003