Stereochemistry and NMR data assignment of cyclopeptide alkaloids from Zizyphus oxyphylla.
The structures of (3S,7R,13S)-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 1H and 13C NMR spectroscopic data assignments of these compounds are now described. Compounds 1 and 2 are reported for the first time from Zizyphus oxyphylla.
Nisar
Muhammad
M
Institute of Chemical Sciences, University of Peshwar, Peshwar-25120, Pakistan. akhundin@yahoo.com
Kaleem
Waqar Ahmad
WA
Adhikari
Achyut
A
Ali
Zulfiqar
Z
Hussain
Nusrat
N
Khan
Inamullah
I
Qayum
Mughal
M
Choudhary
M Iqbal
MI
D000470:Alkaloids / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008968:Molecular Conformation; D010456:Peptides, Cyclic / Q000737:chemistry*; D031957:Ziziphus / Q000737:chemistry*
D000470:Alkaloids; D010456:Peptides, Cyclic