Int. J. Mol. Sci. 2012, 13(9), 11520-11529; doi:10.3390/ijms130911520
Article

New 14-Membered Cyclopeptide Alkaloids from Zizyphus oxyphylla Edgew

1email, 2email, 3email, 4email, 5email and 6,* email
Received: 26 July 2012; in revised form: 29 August 2012 / Accepted: 30 August 2012 / Published: 14 September 2012
(This article belongs to the Section Bioactives and Nutraceuticals)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: Two new 14-membered cyclopeptide alkaloids, Oxyphylline B (4) and Oxyphylline C (5), along with three known 13-membered cyclopeptide alkaloids, were isolated from stem and roots of Zizyphus oxyphylla Edgew. The compounds were tested for antibacterial activity. Oxyphylline B (4) showed comparatively better antibacterial activities against Escherichia coli (MIC, 5 µg/mL) than other compounds. This compound also exhibited weak antimicrobial activities against Staphylococcus aureus (MIC, 25 µg/mL), Pseudomonas aeruginosa (MIC, 50 µg/mL) and Salmonella typhi (MIC, 50 µg/mL).
Keywords: Zizyphus oxyphylla Edgew; cyclopeptide alkaloids; antibacterial activity
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MDPI and ACS Style

Kaleem, W.A.; Nisar, M.; Qayum, M.; Zia-Ul-Haq, M.; Adhikari, A.; De Feo, V. New 14-Membered Cyclopeptide Alkaloids from Zizyphus oxyphylla Edgew. Int. J. Mol. Sci. 2012, 13, 11520-11529.

AMA Style

Kaleem WA, Nisar M, Qayum M, Zia-Ul-Haq M, Adhikari A, De Feo V. New 14-Membered Cyclopeptide Alkaloids from Zizyphus oxyphylla Edgew. International Journal of Molecular Sciences. 2012; 13(9):11520-11529.

Chicago/Turabian Style

Kaleem, Waqar Ahmad; Nisar, Muhammad; Qayum, Mughal; Zia-Ul-Haq, Muhammad; Adhikari, Achyut; De Feo, Vincenzo. 2012. "New 14-Membered Cyclopeptide Alkaloids from Zizyphus oxyphylla Edgew." Int. J. Mol. Sci. 13, no. 9: 11520-11529.

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