Limonoids from the West African Trichilia welwitschii (Meliaceae)

The seeds of Trichilia welwitschii C.DC. (Meliaceae) yielded three limonoids, dregeanin DM4 (1), reported here from a natural source for the first time, the known rohituka 3 (2) and trichilia lactone D5 (3). The bark yielded 28,29-dinorcycloart-24-ene-3,4,6-triol (4), sitosterol-3-O-β-d-glucoside, 4-hydroxy-N-methyl-l-proline, stigmasterol and sitosterol. •Limonoids are reported from the seeds of the West African Trichilia welwitschii.•28,29-Dinorcycloart-24-ene-3,4,6-triol was reported from bark of the T. welwitschii.•Prieurianin limonoids from the seeds of T. welwitschii is a chemotaxonomic marker.•Prieurianin class in T. welwitschii but nimbolinin in T. heudelotii is a distinction.