Problem: Histamine, whose release in the body triggers nasal secretions and constricted airways, has three nitrogen atoms. List them in order of increasing basicity, and explain your ordering.

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The basicity of an amine is increased by electron-donating groups and decreased by electron-withdrawing groups.

Label the nitrogens: 


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Histamine, whose release in the body triggers nasal secretions and constricted airways, has three nitrogen atoms. List them in order of increasing basicity, and explain your ordering.

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