Scheme 1
From: Synthesis, X-ray crystallography and antimicrobial activity of 2-cyanoguanidinophenytoin

Reaction of benzil 1 with cyanoguanide 2.
From: Synthesis, X-ray crystallography and antimicrobial activity of 2-cyanoguanidinophenytoin

Reaction of benzil 1 with cyanoguanide 2.