[Studies on the alkaloidal components of Polygala tenuifolia willd]

1-Carbobutoxy-beta-carboline, N9-formylharman, 1-carboethoxy-beta-carboline, 1-carbomethoxy-beta-carboline, perlolyrine, harman and norharman were isolated from the rhizoma of Polygala lenuifolia. The structures were elucidated on the basis of spectroscopic studies and chemical evidence, 1-carbobutoxy-beta-carboline has not been seported before.