Roylea calycina

The aerial parts of Conyza steudellii (Asteraceae) have given new labdane xylosides, while from the leaves of Conyza trihecatactis, a xylopyranoside of 13-epi-sclareol has been isolated among other labdanes [104,105]. Havardic acids A-F (as methyl esters), have been isolated from another genus of the Asteraceae family, i.e Grindelia havardii [106]. 11-oxo-manoyl oxide derivatives and coleosol, which is also a manoyl oxide derivative, have been obtained from Coleus forskohlii (Labiateae) [107,108] while from another plant of the Labiatae family, Roylea calycina a tumor inhibitory compound, namely precalyone, as well as calyone have been isolated [109]. 

Calyone (27) and precalyone (28), the latter showing tumour inhibitory activity, have been isolated from Roylea calycina (Labiatae), and coleosol (29) is a manoyl oxide derivative which has been isolated from another of the Labiatae used in folk medicine. Coleus forskohlii ... 

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See also in sourсe #XX -- [ ]

See also in sourсe #XX -- [ , ]

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