(S)-Cyclic(D-alanyl-L-alanyl-N,O-dimethyl-L-tyrosyl-L-alanyl-.beta.-hydroxy-N-methyl-L-tyrosyl-3-hydroxy-N-methyl-L-tyrosyl) cyclic (54.fwdarw.63)-ether 22-Oxa-3,6,9,12,15,29-hexaazatetracyclo[14.12.2.218,2-1.123,27]tritriacontane, cyclic peptide deriv. 64755-14-2 BOUVARDIN Cyclic(D-alanyl-L-alanyl-N,O-dimethyl-L-tyrosyl-L-alanyl-.beta.-hydroxy-N-methyl-L-tyrosyl-3-hydroxy-N-methyl-L-tyrosyl), cyclic(54.fwdarw.63)-ether, (S)- From fraction F049 of Bouvardia ternifolia NSC 259968 NSC259968