Selaginella uncinata (blue spikemoss, peacock moss, peacock spikemoss) is a species of plant in the Selaginellaceae family.
6-(5-Carboxyl-2-methoxyphenyl)-apigenin, a new flavonoid, was isolated from the 60% ethanol extract of Selaginellauncinata (Desv.) Spring. Its structure was established by spectroscopic methods. Compound 1 represents the first example of the flavonoids possessing a benzoic acid substituent at C-6.
Seven 3',8''-linked bioflavonoids, including one new compound, (2''S)-2'', 3''-dihydroamentoflavone-4'-methyl ether and six known compounds: (2S)-2,3- dihydroamentoflavone-4'-methyl ether, (2S,2''S)-2,3,2'',3''-tetrahydroamento- flavone-4'-methyl ether, (2S,2''S)-tetrahydroamentoflavone, (2S)-2,3-dihydro- amentoflavone and (2''S)-2'',3''-dihydroamentoflavone (6) and amentoflavone, were isolated from the 60% ethanolic extract of Selaginella uncinata (Desv.) Spring.