A new nitrogenous compound, named sessiline [5-(5-oxo-pyrrolidin-2-yloxymethyl)-furan-2-carbaldehyde (1)], was isolated from the fruits of Acanthopanax sessiliflorus, together with (-)-sesamin, scoparone, protocatechuic acid, ursolic acid, hyperin and 5-hydroxymethylfurfural by CC. The structures of these compounds were elucidated by physico-chemical and spectral analysis.