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An undescribed phyllocoumarin-3-O-α-L-rhamnopyranoside 8 together with catechin 1, catechin-3-O-α-L-rhamnopyranoside 2, catechin-[7,8-bc]-4β-(3,4-dihydroxyphenyl)-dihydro-2(3H)-pyranon 3, 5-O-trans-p-coumaroylquinic acid 4, trans-p-coumaric acid 5, catechin-[5,6-e]-4β-(3,4-dihydroxyphenyl)-dihydro-2(3H)-pyranon 6, catechin-[5,6-e]-4α-(3,4-dihydroxyphenyl)-dihydro-2(3H)- pyranon 7, phyllocoumarin 9 and vaccinin A 10 were isolated from the roots of Lannea kerstingii. The structures of the compounds were established using NMR, IR and HR-ESI-MS spectroscopic analysis.

Lannea kerstingii is known for its multiple therapeutic and biological activities. Despite of many traditional uses of this plant, scientific research on the content of its chemical compounds is still limited. This study aims to isolate the chemical compounds contained in the n-butanol fraction of Lannea kerstingii leaves. The chemical investigation of the leaves of Lannea kerstingii led to isolation of three undescribed C-13 norisoprenoids, lankerstinol A-C (1-3), together with six (4-9) known flavonoid glycosides. The structures of these compounds were established by spectroscopic analyses.

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