Synonyms: b-Alanine,N-[N-[N-[N-[1-(4-carboxy-2-hydroxy-1-oxopentyl)-L-prolyl]-L-valyl]-N-methyl-L-valyl]-N-methyl-L-alanyl]-,r-lactone;Pyrrolo[1,2-d][1,4,7,10,13,16]oxapentaazacyclononadecine, cyclic peptidederiv.; Destruxin D, 2-L-valine-; Destruxin D2