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Title

Secondary metabolites from two species of Tolpis and their biological activities

AuthorsTriana, Jorge ; López, Mariana; Pérez, Francisco Javier; Rico, Milagros; López, Aroa; Estévez, Francisco; Marrero, María Teresa; Brouard, Ignacio ; León, Francisco
KeywordsAsteraceae
Tolpis proustii
Tolpis lagopoda
Ursane-triterpenes
Taraxastane-triterpenes
Issue Date1-Nov-2012
PublisherMultidisciplinary Digital Publishing Institute
CitationMolecules 17(11): 12895-12909 (2012)
AbstractPhytochemical research of two Tolpis species, T. proustii and T. lagopoda, led to the isolation of three new compounds: 30-chloro-3β-acetoxy-22α-hydroxyl-20(21)- taraxastene (1), 3β,22α-diacetoxy-30-ethoxy-20(21)-taraxastene (2) and 3β,28-dihydroxy11α-hydroperoxy-12-ursene (3). The structures of the new compounds were elucidated by means of extensive IR, NMR, and MS data and by comparison of data reported in the literature. The in vitro antioxidant activities of the extracts were assessed by the DPPH and ABTS scavenging methods. The cytotoxicity of several known compounds and its derivatives was also assessed against human myeloid leukemia K-562 and K-562/ADR cell lines.
URIhttp://hdl.handle.net/10261/157725
DOI10.3390/molecules171112895
ISSN1420-3049
Appears in Collections:(IPNA) Artículos
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