Álvarez-Caballero JM, Cuca-Suárez LE, Coy-Barrera E, Carrasco-Pancorbo A, Olmo-García L, Martin J, Cruz MDL, Peŕez-Victoria I, Reyes F. Caerulines A and B, Flavonol Diacylglycosides from
Persea caerulea.
ACS OMEGA 2021;
6:32631-32636. [PMID:
34901611 PMCID:
PMC8655767 DOI:
10.1021/acsomega.1c04255]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Accepted: 10/15/2021] [Indexed: 06/14/2023]
Abstract
Two undescribed 4'-O-methylkaempferol-[3″,4″-di-p-coumaroyl]-α-l-rhamnopyranosides, caerulines A and B (1-2), along with three known 4'-O-methylkaempferol diacylrhamnosides isomers (3-5) were isolated from an ethanol extract of the leaves of Persea caerulea, a native plant growing on the Colombian Caribbean coast. The chemical structures of 1 and 2 were elucidated by spectroscopic methods. The effect of compounds 1-5 against four pathogenic microorganisms [i.e., methicillin-resistant Staphylococcus aureus (MRSA), Acinetobacter baumannii, Candida albicans, and Aspergillus fumigatus] was tested in vitro. The compounds exhibited no activity against these pathogens except MRSA (MIC 12-48 μg/mL). Caeruline B (2) was found to be the most active compound with a modest anti-MRSA activity (MIC = 12 μg/mL).
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