(±)-Salsolidine is an alkaloid that has been found in H. articulatum.1 It inhibits catechol-O-methyltransferase (COMT; Ki = 190 ?M).2
1.El-Shazly, A., and Wink, M.Tetrahydroisoquinoline and β-carboline alkaloids from Haloxylon articulatum (Cav.) Bunge (Chenopodiaceae)Z. Naturforsch C. J. Biosci.58(7-8)477-480(2003) 2.Sanft, K., and Thomas, H.Competitive inhibition of catechol-O-methyltransferase by the tetrahydroisoquinoline alkaloids salsolidine and 1-carboxysalsolineZ. Naturforsch C. J. Biosci.44(1-2)173-176(1989)