title: 7-[(3-Chloro-6-methyl-6,11-dihydro-dibenzo[c,f][1,2]thia-zepin-11-yl)amino]-hepta-noic acid S,S-dioxide hydro-chloride.
abstract: In the title compound, C(21)H(26)ClN(2)O(4)S(.)Cl, also known as tianeptine hydro-chloride, the seven-membered ring adopts a boat conformation. The dihedral angle between the mean planes of the benzene rings is 44.44 (7)°. There is an intra-molecular hydrogen bond formed via S= O⋯H-N. In the crystal, mol-ecules are connected via pairs of N-H.·O, N-H⋯Cl and O-H⋯Cl hydrogen bonds, forming inversion dimers, which are consolidated by C-H⋯O inter-actions. The dimers are linked by C-H⋯O and C-H⋯Cl inter-actions, forming a two-dimensional network lying parallel to (011).
authors.affiliation: Latvian Institute of Organic Synthesis, Aizkraukles Street 21, Riga, LV-1006,  Latvia.
authors.forename: Anatoly
authors.initials: A
authors.lastname: Mishnev
authors.forename: Alvis
authors.initials: A
authors.lastname: Zvirgzdins
authors.forename: Andris
authors.initials: A
authors.lastname: Actins
authors.forename: Mara
authors.initials: M
authors.lastname: Delina