Abstract

URIBURU, María L; GIL, Roberto R; SOSA, Virginia E  and  DE LA FUENTE, Juana R. Caffeoyl esters of threonic acid and its lactone from Viguiera Pazensis. J. Argent. Chem. Soc. [online]. 2008, vol.96, n.1-2, pp.55-61. ISSN 1852-1428.

Two caffeoyl esters of sugar derivatives: 3-O-caffeoyl-2-C-methyl-D-threono-1,4-lactone, 4-O-caffeoyl-2-C-methyl-D-threonic acid, along with the previously known compounds: 2-C-methyl-D-threono-1,4-lactone, caffeic acid, carabrone, 5,7,3'-trihydroxy-4'-methoxyflavone, and 5,7,3'-trihydroxy-6,4'-dimethoxyflavone were isolated from the aerial parts of Viguiera pazensis. Their structures were elucidated by application of various spectroscopic methods, including 1D and 2D NMR spectroscopy.

Keywords : Viguiera pazensis; Asteraceae; 3-O-caffeoyl-2-C-methyl-D-threono-1,4-lactone; 4-O-caffeoyl-2-C-methyl-D-threonic acid; 2-C-methyl-D-threono-1,4-lactone.

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