A Novel 4-(4,5-dimethoxy-2-nitrophenyl)-2,6-dimethyl-3,5-dicarbethoxy-1,4-dihydropyridine (C<sub>21</sub>H<sub>26</sub>N<sub>2</sub>O<sub>8</sub>): Microwave-Irradiated Hantzsch Ester Synthesis, Characterization and Molecular Crystal
Molecular crystals and liquid crystals