Several different groups of low molecular weight polyphenols in Douglas-fir outer bark appear to be precursors to phlobaphene formation. Isolated flavonoids, flavonoid glycosides, procyaninidins, and lignans all have characterstic signals in their 13C-NMR spectra...
CITATION STYLE
Malan, J. C. S., Chen, J., Foo, L. Y., & Karchesy, J. J. (1992). Phlobaphene Precursors in Douglas-Fir Outer Bark. In Plant Polyphenols (pp. 411–419). Springer US. https://doi.org/10.1007/978-1-4615-3476-1_22
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