RESUMO
OBJECTIVE: To Study liposoluble constituents of Teurium labiosum. METHODS: The constituents were isolated and purified by silica gel column and Sephadex LH-20 chromatography. Their structures were elucidated by physicochemical properties and spectral analysis. RESULTS: Six compounds were obtained and identified as stearic acid (I), alpha-spinasterol (II), Methyl phaeophorbide a (III), friedelino (IV), lupeol (V) and stigmasta-5,22-dien-3beta-ol (VI). CONCLUSION: All these compounds are obtained from this plant for the first time.
Assuntos
Lamiaceae/química , Ácido Oleanólico/análogos & derivados , Plantas Medicinais/química , Ácidos Esteáricos/isolamento & purificação , Estigmasterol/análogos & derivados , Álcoois/química , Álcoois/isolamento & purificação , Espectroscopia de Ressonância Magnética , Ácido Oleanólico/química , Ácido Oleanólico/isolamento & purificação , Triterpenos Pentacíclicos , Solventes , Ácidos Esteáricos/química , Estigmasterol/química , Estigmasterol/isolamento & purificação , Triterpenos/química , Triterpenos/isolamento & purificaçãoRESUMO
In the title compound, C(17)H(14)O(6), the benzopyran ring system is essentially planar and forms a dihedral angle of 6.84â (4)° with the other benzene ring. In the crystal structure, centrosymmetrically related mol-ecules are linked into dimers by O-Hâ¯O hydrogen bonds. The crystal packing is controlled by C-Hâ¯π and π-π stacking inter-actions involving the benzopyran and benzene rings, with centroid-centroid distances between 3.645â (2) and 3.986â (2)â Å.
