(vi) 
3CH 3 .(CH 2 ) 3 .CH(NE 
I 3CH 3 .(CH 2 ) 2 .CH(NE 
a amino-valerianic 
9 CH 3 . CH 2 . CH(NH| 
CH 3 .CH(NH 2 ).0 
a amino-propionic 
3 CH 3 .C(NH).CH(C 2 E 
imino-ethyl-acetyl-ac 
3CH a .C(NH).CH(CE 
imino-methyl-acetyl-a 
9 CH 3 .C(NH).CH, 
imino-acetyl-acetii 
CH 3 .C(NH).COC 
imino-pyruvic aci 
a amino-caproic 
a amino-butyric 
^-' 144^288 ^ 31 ) 0(1 
or 16 C 9 H 1 s N 2 0 
