1 OPT S-benzyl-N-(biphenyl-4-ylacetyl)-L-cysteinyl-N~5~-(diaminomethyl)-D-ornithyl-N-(2-phenylethyl)-L-tyrosinamide 1.000 2 NSZ N-(biphenyl-4-ylacetyl)-S-methyl-L-cysteinyl-D-arginyl-N-(2-phenylethyl)-L-phenylalaninamide 0.883