111011-00-8 Cyclic-ptlt-4-ampa Cyclo(phe-trp-lys-thr-4-ampa) Cyclo(phenylalanyl-tryptophyl-lysyl-threonyl-4-(aminomethyl)phenylacetic acid) L-Threonine, N-((4-(aminomethyl)phenyl)acetyl)-L-phenylalanyl-D-tryptophyl-L-lysyl-, cyclic (4-1)-peptide