cationic exchange high-performance liquid chromatography ( hplc ) showed that the products formed from simple aliphatic aldehydes , with the exception of formaldehyde , were analogues of those formed from acetaldehyde , earlier shown by us to be imidazolidinone derivatives , that is , cyclic addition products of the n-terminal aminoamide function of alpha and beta chains .
C0001992
aldehydes
C0000966
acetaldehyde