Anthocyanins from Mauve Flowers of Erlangea tomentosa (Bothriocline longipes) Based on erlangidin – The first Reported Natural Anthocyanidin with C-ring methoxylation
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Date
2019
Journal Title
Journal ISSN
Volume Title
Publisher
Phytochemistry Letters
Abstract
Above 700 different anthocyanins have been isolated from plants. These flavonoid pigments are grouped after
the number and position of hydroxy- and methoxy-groups on their anthocyanidin A- and B-rings, which influence
their properties. In this study two new anthocyanins, erlangidin 5-O-(4″-(E-caffeoyl)-6″-(malonyl)-β-glucopyranoside)-
3′-O-(6‴-(3II-(β-glucopyranosyl)-E-caffeoyl)-β-glucopyranoside) and erlangidin 5-O-(6″-(malonyl)-
β-glucopyranoside)-3′-O-(6‴-(3II-(β-glucopyranosyl)-E-caffeoyl)-β-glucopyranoside) were isolated from
purple flowers of Erlangea tomentosa (Bothriocline longipes) Oliv. & Hiern (Asteraceae) in amounts of ∼1.6 and
0.6 mg/g fr. wt., respectively. They were found to contain the first reported natural anthocyanidin with a
methoxy-group on the heterocyclic C-ring, which we have given the name erlangidin.” During extraction, isolation
and storage in acidified methanolic solvents the two anthocyanins were both partly converted to their
demalonylated and methylmalonyl esterified forms. Spectroscopic and chromatographic characteristics for erlangidin
in comparison with the common anthocyanidins, which it might be mistaken for, are included.
Description
Keywords
Erlangea tomentosa, Bothriocline longipes, Compositae, Anthocyanins, Erlangidin, Analytical characteristics
Citation
Adaku, C., Skaar, I., Berland, H., Byamukama, R., Jordheim, M., & Andersen, Ø. M. (2019). Anthocyanins from mauve flowers of Erlangea tomentosa (Bothriocline longipes) based on erlangidin–The first reported natural anthocyanidin with C-ring methoxylation. Phytochemistry Letters, 29, 225-230.https://doi.org/10.1016/j.phytol.2018.12.016