RESUMO
Two new alkaloids were isolated together with 16 known lupin alkaloids from the leaves and stems of Chinese Maackia amurensis. Their structures were determined by spectroscopic methods to be (-)-6alpha-methoxylupanine and (-)-5alpha-(12-cytisinylmethyl)-6alpha-hydroxylupan ine and identified by comparison with synthetic samples. The structures of lupin alkaloids were also related to the geographical distributions of the Maackia plants.
Assuntos
Alcaloides/química , Fabaceae/química , Plantas Medicinais/química , Alcaloides/isolamento & purificação , Dessecação , Espectroscopia de Ressonância Magnética , Espectrometria de Massas , Espectrofotometria InfravermelhoRESUMO
The variations of the essential oils in Acorus calamus and their major compositions with seasons and producing areas were investigated by steam distillation and internal standard method. The result has shown that June is the best season for A. calamus cropping and that the major components of the volatile oil in the same part of the plant from different producing areas have the same chemical structure type.
Assuntos
Medicamentos de Ervas Chinesas/química , Óleos Voláteis/análise , Plantas Medicinais/química , Derivados de Alilbenzenos , Anisóis/análise , Óleos Voláteis/química , Estações do Ano , Sesquiterpenos/análiseRESUMO
A new tricyclic sesquiterpene, named calamenone (1), and two known sesquiterpenes, calamendiol (2) and isocalamendiol (3), were isolated from the roots of Acorus calamus L. The structure of the new compound was elucidated on the basis of spectral and X-ray diffraction data.