Hydroxycinnamic acid-spermidine amides from pollen of Alnus glutinosa, Betula verrucosa and Pterocarya fraxinifolia

Abstract Hydroxycinnamic acid—spermidine amides have been isolated from pollen and identified from their 1 H NMR and mass spectral data: N 1 , N 5 -di-( E )- p -coumaroylspermidine from Pterocarya fraxinifolia (Lam.) Spach., N 5 , N 10 -di-( E )-feruloylspermidine from Betula verrucosa Ehrh. a mixture of two di-( E )- p -coumaroylspermidines from Alnus glutinosa (L.) Gaertn.