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.
Lamiaceae/chemistry , Oleanolic Acid/analogs & derivatives , Plants, Medicinal/chemistry , Stearic Acids/isolation & purification , Stigmasterol/analogs & derivatives , Alcohols/chemistry , Alcohols/isolation & purification , Magnetic Resonance Spectroscopy , Oleanolic Acid/chemistry , Oleanolic Acid/isolation & purification , Pentacyclic Triterpenes , Solvents , Stearic Acids/chemistry , Stigmasterol/chemistry , Stigmasterol/isolation & purification , Triterpenes/chemistry , Triterpenes/isolation & purification
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.
