1-[(3,4,5-trimethoxybenzoyl)methyl]- pyridinium bromide

disorder in main residue; R factor = 0.056; wR factor = 0.127; data-to-parameter ratio = 18.8. In the title salt, C37H51N2O10 +Br, the 1,4-dihydropyridine (1,4-DHP) ring adopts a slighly puckered boat conformation. The N and opposite C atoms deviate from the least-squares plane calculated through the four other ring atoms by 0.068 (5) and 0.224 (5) Å, respectively. The orientation of both C O groups is similar (cis with respect to the double bonds of 1,4-DHP. The pyridinium ring has an axial orientation with respect to the1,4-DHP ring and is almost perpendicular to the least-squares plane of the 1,4-DHP ring, making a dihedral angle of 89.2 (3). The molecule has a compact shape due to the parallel orientation of the long-chain substituents. One of the butoxy groups was fond to be disordered (occupancy ratio 0.70:0.30). In the crystal, the bromide anion accepts a weak hydrogen bond from the N—H group of a neighboring 1,4-DHP ring. Related literature For general information on the relationship between 1,4-dihydropyridine ring substituents and pharmaceutical effects, see: Hasko & Pacher (2008); Niebauer & Robinson (2006); Ruiz et al. (2012); Swarnalatha et al. (2011). For the synthesis of the DHP 3-pyridyl derivative, see: Saini et al. (2008)