title: 2,3-Dimeth-oxy-10-oxostrychnidinium hydrogen oxalate dihydrate.
abstract: In the cation of the title salt, C23H27N2O4 (+)·C2HO4 (-)·2H2O, both fused pyrrolidine rings exhibit twisted conformations, while the piperidine rings adopt screw-boat and boat conformations. In the crystal, the three components are linked via O-H⋯O and N-H⋯O inter-actions, forming a tape along the b axis. The tapes are further linked by weak C-H⋯O hydrogen bonds. forming a three-dimensional network.
authors.affiliation: Department of Physics, Presidency College, Chennai 600 005, India.
authors.forename: P
authors.initials: P
authors.lastname: Krishnan
authors.forename: K
authors.initials: K
authors.lastname: Gayathri
authors.forename: N
authors.initials: N
authors.lastname: Sivakumar
authors.forename: G
authors.initials: G
authors.lastname: Chakkaravarthi
authors.forename: G
authors.initials: G
authors.lastname: Anbalagan