Chemical Constituents of Clematis montana

AIM: To study the chemical constituents of Clematis montana Buch.-Ham. ex DC.. METHODS: Aerial part of the plant was extracted by ethanol firstly and then the ethyl acetate part of the ethanol extract was isolated by different column chromatographic techniques including silica gel and Sephadex LH-20. Structures of these compounds were identified on the basis of spectroscopic analysis. RESULTS: Fourteen compounds were isolated and their structures were determined to be coniferaldehyde (1),caffeic acid (2),pluchoic acid (3),protocatechualdehyde (4),vanillin (5),hydroxytyrosol (6),4-carbonyl-5-hydroxy methyl valerate (7),4-hydroxydodec-2-enedioic acid (8),(+)-dihydrodehydrodiconiferyl alcohol (9),(-)-syringaresinol (10),(+)-guayarol (11),(-)-arctiin (12),(-)-lariciresinol (13),and hyperin (14). CONCLUSION: All the compounds were obtained from this plant for the first time.