Sigma-Aldrich
CARBOBENZYLOXY-L-TYROSYL-L-THREONINAMIDE
Copper
CARBOBENZYLOXYPROLYLGLYCINE METHYL ESTER
CARBOBENZYLOXYSARCOSYLGLYCINE
CARBOBENZYLOXYTRYPTOPHAN BETA-NAPHTHYLAMIDE
CARBOBENZYLOXYTYROSYLTYROSINE METHYL ESTER