The detection of 2-methylcyclohexane in the HDN of MCHA explains the C(sp3)-N bond cleavage showing that MCH is formed via nucleophilic substitution of the amine group of MCHA.

• 通过检测MCHA中的甲基环己烷(MCH)，解释C(sp~3)-N键断裂是由于MCHA中的胺基被亲核取代。