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  • Title: New carvotanacetone derivatives from Sphaeranthus africanus.
    Author: Ragasa CY, Tsai PW, Galvez CT, Shen CC.
    Journal: Planta Med; 2010 Feb; 76(2):146-51. PubMed ID: 19670157.
    Abstract:
    The dichloromethane extract of the air-dried leaves of Sphaeranthus africanus afforded four new carvotanacetone derivatives (1, 2, 3A, and 3B). Their structures were elucidated by extensive 1D and 2D NMR spectroscopy. Compounds 1- 3 exhibited antibacterial activity against Staphylococcus aureus and Pseudomonas aeruginosa and antifungal activity against Candida albicans, Trichophyton mentagrophytes and Aspergillus niger.
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