Acids of an aqueous extract of the woody verdure of the pine Pinus sylvestris
β Scribed by Z. A. Karepova; S. M. Repyakh; V. L. Levdikova
- Publisher
- Springer
- Year
- 1983
- Tongue
- English
- Weight
- 174 KB
- Volume
- 19
- Category
- Article
- ISSN
- 0009-3130
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## Abstract Three lignans were isolated from a bioactive fraction of the 70% aqueous acetone extract of the pine (__Pinus sylvestris__ L.) bark. Their structures were identified by highβresolution positive ion EI mass spectrometry and NMR spectroscopy. The complete assignment of proton and carbon s
needles (1 from less than 0.1 to about 0.9 pmol per g fresh weight, and 2 from 0.8 to 2.4 pmol per g fresh weight).I6] Figure 1 shows a typical HPLC elution profile of a methanolic extract from cotyledons after four days of UV-B treatment. Compounds 1 and 2 were purified and isolated by countercurr