Buy article online - an online subscription or single-article purchase is required to access this article.
organic compounds
The structure of the title compound, N,N-dimethyl-γ-phenyl-2-pyridinepropanaminium hydrogen maleate, C16H21N2.C4H3O4-, a potent anti-allergic drug, is composed of hydrogen-bonded pheniraminium cations and maleate anions, the latter forming a seven-membered ring through an intramolecular hydrogen bond.