Phytochemical studies on the methanolic extract of the leaves of Buxus hyrcana pojark, collected in Iran, have resulted in the isolation of two new triterpenoidal alkaloids, (+)-2α,16β,31-triacetylbuxiran (1), (+)-2α,16β,31-triacetyl-9-11-dihydrobuxiran (2). Spectroscopic methods were used to elucidate the structures of these new natural products. © 2006 Verlag der Zeitschrift für Naturforschung.