Two new cyclic nonapeptides, named clausenlanins A (1) and B (2), were isolated from the roots and rhizomes of Clausena lansium. Their structures were elucidated as cyclo-(Gly-L-Leu-L-Ile-L-Leu-L-Leu-L-Leu-L-Leu-L-Leu-L-Leu) (1) and cyclo-(Gly-L-Leu-L-Val-L-Leu-L-Leu-L-Leu-L-Leu-L-Leu-L-Leu) (2) respectively on the basis of extensive spectroscopic analysis, particularly 2D NMR spectra taken at the temperature of 338 or 303 K and MS.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5507809 | PMC |
| http://dx.doi.org/10.1007/s13659-017-0133-y | DOI Listing |
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