${\displaystyle {\mathsf {\begin{array}{l}{\ce {{R-N=C=O}+H2O->[{\ce {step}}\ 1]R1-{\underset {| \atop \displaystyle H}{N}}-{\overset {\displaystyle O \atop \|}{C}}-O-H->[{\ce {step}}\ 2][{\ce {decomposes}}]{R-NH2}+CO2(g)}}\\{\ce {{R-N=C=O}+R-NH2->[{\ce {step}}\ 3]-R-{\underset {| \atop \displaystyle H}{N}}-{\overset {\displaystyle O \atop \|}{C}}-{\underset {| \atop \displaystyle H}{N}}-R}}{-}\end{array}}}}$

Вики-код для замены:

<math chem>\mathsf{\begin{array}{l}

\ce{ {R-N=C=O} + H2O ->[\ce{step}\ 1] R1-\underset{ | \atop \displaystyle H}{N}-\overset{\displaystyle O \atop \| }{C}-O-H ->[\ce{step}\ 2][\ce{decomposes}] {R-NH2} + CO2(g)} \\ \ce{ {R-N=C=O} + R-NH2 ->[\ce{step}\ 3] -R-\underset{ | \atop \displaystyle H}{N}-\overset{\displaystyle O \atop \| }{C}-\underset{ | \atop \displaystyle H}{N}-R}{-} \end{array}}</math>

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