α-L-aspartyl-N6-(tert-butoxycarbonyl)-L-lysyl-N1-(tert-butoxycarbonyl)-L-tryptophyl-L-alanyl-O-tert-butyl-L-seryl-L-leucyl-N1-(tert-butoxycarbonyl)-L-tryptophyl-N-trityl-L-asparaginyl-N1-(tert-butoxycarbonyl)-L-tryptophyl-L-phenylalaninamid, tert-butylester
α-L-aspartyl-N6-(tert-butoxycarbonyl)-L-lysyl-N1-(tert-butoxycarbonyl)-L-tryptophyl-L-alanyl-O-tert-butyl-L-seryl-L-leucyl-N1-(tert-butoxycarbonyl)-L-tryptophyl-N-trityl-L-asparaginyl-N1-(tert-butoxycarbonyl)-L-tryptophyl-L-phenylalaninamide, tert-butyl ester