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Seventeen compounds of diverse classes including four flavonoid glycosides, five ellagic acid derivatives, and eight other metabolites were isolated from the methanolic extract of the defatted seed kernel of  Irvingia gabonensis . Among the isolates, quercetin 3- O -methyl-4′-[α-L-rhamnopyranosyl-(1→3)]- O -α-L-rhamnopyranoside ( 1 ) and 3,3′-di- O -methyl-4'- O -α-L-rhamnopyranosylellagic acid 4-sulfate ester ( 5 ) were found to be previously undescribed. Structure elucidation was mainly achieved by the interpretation of 1D and 2D NMR and HRESIMS spectral data. Though compound  6  was previously reported, its  13 C NMR data is being reported herein for the first time. To the best of our literature search knowledge, this is the first phytochemical report on  I. gabonensis  seed kernels.

Flavonoid glycosides and ellagic acid cognates from defatted African mango ( Irvingia gabonensis ) seed kernel