136 CHEMISTRY OF THE PROTEIDS CHAP. 



Phenyl-brompropionyl-a-phenyl-alanin : 



C H 5 . CH 2 . CHBr . CO . NH . CH ( 



,COOH 

 ^CH 2 . C 6 H 5 . 



Further Derivative of Prolin (V.) 



a-Brom-iso-capronyl-prolin (inactive) : 



CH 



>CH . CH 2 . CHBr . CO . NC 4 H 7 . COOH. 



Leucyl-prolin : 

 CH 



g, / 



X CH.CH .CH.CO.N X 



.CH 2 



u ' - * 



COOH. 

 Leycyl-prolin-anhydride : 



3V )CH.CH 2 .CH.CO.N/ 2 | 

 CH 3 X | />CH.CH 2 



NH CO 



Further Derivatives of Phenyl-alanin (VI.) 



a-Brom-iso-capronyl-phenyl-alanin : 



/COOH 

 (C 4 H 9 ) . CHBr . CO . NH . CH^ 



CH 2 . C 6 H 5 . 

 a-Leucyl-phenyl-alaniri : 



/COOH 

 (C 4 H 9 )(NH 2 )CHCO . NH . CH<^ 



N CH 2 .C 6 H 5 . 

 Leucyl-a-leucyl-phenyl-alanin : 



/COOH 

 NH 2 CH(C 4 H 9 )CO . NHCH(C 4 H 9 )CO . NH . CH<^ 



CH 2 . C 6 H 5 . 

 Alanyl-phenyl-alanin : 



/COOH 

 (CH 3 )(NH 2 )CHCO . NH . CH<" 



CH 2 . C 6 H 5 . 

 Glycyl-phenyl-alanin : 



NH 2 CH 2 CO . NH . CH<^ 



CH 2 . C 6 H 5 . 

 Leucyl-glycyl-phenyl-alanin : 



/COOH 

 NH 2 (C 4 H 9 )CHCO . NHCH 2 . CO . NH . CH<^ 



CH 2 . C 6 H 6 . 



