C6H5NH2\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{NH}_{2}C6H5NH2
(CH3CO)2O\left(\mathrm{CH}_{3} \mathrm{CO}\right)_{2} \mathrm{O}(CH3CO)2O
CH3COCH3+NH3\mathrm{CH}_{3} \mathrm{COCH}_{3}+\mathrm{NH}_{3}CH3COCH3+NH3
HCHO+NH3\mathrm{HCHO}+\mathrm{NH}_{3}HCHO+NH3