The colorimetric estimation of N(2-pyridyl) substituted anti-histamine drugs.
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D018926:Anti-Allergic Agents; D003124:Colorimetry; D006632:Histamine; D018494:Histamine Agents; D006801:Humans
D018926:Anti-Allergic Agents; D018494:Histamine Agents; D006632:Histamine