RESUMEN
Objective To study the chemcial constituents in the root and stem of Piper laetispicum. Methods Compounds were separated and purified by silica gel column. Their structures were identified on the basis of spectral methods. Results Six compounds were isolated and identified from the root and stem of P. laetispicum: N-isobutyl-(3, 4-methylendioxyphenyl)-2E, 7E-nonadienamide (Ⅰ), pipercallosidine (Ⅱ), N-isobutyl-7-(3, 4-methylendioxyphenyl)-2E, 4E-heptadienamide (Ⅲ), 4, 5-dihydropiperlonguminine (Ⅳ), 1-cinnamoylpyrrolidine (Ⅴ), piperitol (Ⅵ). Conclusion Compound Ⅰ is a novel one, named as laetispiamide B and compound Ⅱ is isolated from P. laetispicum for the first time.
RESUMEN
Objective To investigate the chemical constituents in the stems and leaves of Arachis hypogaea.Methods The isolated compounds Ⅰ—Ⅳ were obtained by the combination of silica gel,ODS-18,and Sephadex LH-20 column chromatographies.Structural elucidation was conducted by the moedrn spectral method.Results Seventeen compounds were isolated and identified from the water extraction,and there were four norsesquiterpene compounds from butanol extraction.They are arachiside A(Ⅰ),cucubalactone(Ⅱ),roseoside(Ⅲ),and citroside A(Ⅳ).Conclusion Compound Ⅰ is a new compound named arachiside A and compounds Ⅱ—Ⅳ are isolated from the plants of Arachis Linn.for the first time.