Two new y-glutamylpeptides (y-L-glutamyl-L-2-amino-3-methylenepentanoic acid and y-L-glutamyl-2 amino-3-methylene-4-pentenoic acid) and one new unsaturated amino acid, 2-amino-3-methylene-4-pentenoic acid have been isolated from leaves of Philadelphus coronarius. Structures have been determined by chemical and physical methods.