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The structures of (3 S,7 R,13 S)-6-[2-(dimethylamino)-3-phenylpropanoyl]-19-methoxy-2-oxa-6,9,15-triazatetracyclo[16.3.1.0 3,7 . 0 9,13 ]docosa-1-(22),16,18,20-tetraene-8,14-dione (1), nummularin-C (2) and nummularin-R (3) have been previously determined mainly based on mass spectrometric data. Stereochemistry and complete  1 H and  13 C NMR spectroscopic data assignments of these compounds are now described. Compounds 1 and 2 are reported for the first time from

Stereochemistry and NMR Data Assignment of Cyclopeptide Alkaloids from Zizyphus Oxyphylla