<jats:p>The major alkaloids of the bark of Cinnamomum sp. T.G.H. 13077 have been identified as the benzylisoquinolinea (+)-1-(4'-hydroxybenzyl)-6,7-methylenedioxy-1,2,3,4-tetrahydroisoquinoline (norcinnamolaurine) (l), (-)-cinnamolaurine (2), (+)-reticuline (3), and the aporphine (+)-corydine (4). The structure of norcinnamolaurine, a new alkaloid, was elucidated by N.M.R. and mass spectroscopy and was confirmed by conversion into cinnamolaurine and by synthesis of its racemate. 0.r.d. spectra indicate that both (-)-cinnamolaurine and (+)-norcinnamolaurine belong to the D-series of benzylisoquinoline alkaloids.