N-tert-butyloxycarbonyl-L-phenylalanyl-L-leucine pentachlorophenyl ester
(N-tert-butyloxycarbonyl-L-phenylalanyl-L-methionine)-O-pentachlorophenyl ester
N,O-di-tert-butyloxycarbonyl-L-tyrosylglycine pentachlorophenyl ester
N-tert-butyloxycarbonyl-O-tert-butyloxycarbonyl-L-tyrosyl-glycylglycine pentachlorophenyl ester