Ajmalicine is a monoterpenoid indole alkaloid with formula C21H24N2O3, isolated from several Rauvolfia and Catharanthus species. It is a selective alpha1-adrenoceptor antagonist used for the treatment of high blood pressure. It has a role as a vasodilator agent, an antihypertensive agent and an alpha-adrenergic antagonist. It is a methyl ester, an organic heteropentacyclic compound and a monoterpenoid indole alkaloid. It is a conjugate base of an ajmalicine(1+).

Coryneine (Trimethyl(3,4-dihydroxyphenethyl)aminium) is a quaternary ammonium derivative of dopamine derived from aconite root.

p-Synephrine is widely used in weight loss and weight management as well as in sports performance products, which has antidepressant-like effects in the murine models of forced swimming and tail suspension, it also exerts potent anti-inflammatory effects by inhibition of the NF-κB signaling pathway. Synephrine inhibits eotaxin-1 expression via the STAT6 signaling pathway. Synephrine is a phenethylamine alkaloid that is 4-(2-aminoethyl)phenol substituted by a hydroxy group at position 1 and a methyl group at the amino nitrogen. It has a role as an alpha-adrenergic agonist and a plant metabolite. It is a member of ethanolamines, a member of phenols and a phenethylamine alkaloid. It is a conjugate base of a synephrinium.

p-Synephrine is widely used in weight loss and weight management as well as in sports performance products, which has antidepressant-like effects in the murine models of forced swimming and tail suspension, it also exerts potent anti-inflammatory effects by inhibition of the NF-κB signaling pathway. Synephrine inhibits eotaxin-1 expression via the STAT6 signaling pathway.