N-prolylglycine
N-tert-butyloxycarbonyl-L-phenylalanyl-L-prolylglycine
L-phenylalanyl-L-prolylglycine
1-(tert-butoxycarbonyl)-L-proline
N-tert-butyloxycarbonyl-L-prolyl-L-phenylalanyl-L-prolylglycine
N-tert-butyloxycarbonyl-O-benzyl-L-tyrosyl-L-prolyl-L-phenylalanyl-L-prolylglycyl-L-prolyl-L-isoleucine
N-tert-butyloxycarbonyl-L-tyrosyl-L-prolyl-L-phenylalanyl-L-prolylglycyl-L-prolyl-L-isoleucine
L-tyrosyl-L-prolyl-L-phenylalanyl-L-prolyl-glycyl-L-prolyl-L-isoleucine
L-prolyl-L-phenylalanyl-L-prolylglycyl-L-prolyl-L-isoleucine