3-[(3S)-3-Ethyl-1-methyl­azepan-3-yl]phenyl N-(4-fluoro­phen­yl)carbamate

The asymmetric unit of the title compound, C22H27FN2O2, a (−)-S-meptazinol derivative, contains two mol­ecules. The azepane ring adopts a similar twist chair form in both mol­ecules, while the dihedral angles between the two benzene rings are 88.17 (14) and 89.93 (14)° in the two mol­ecules. The absolute configuration of the mol­ecule was determined from the synthetic starting material. The crystal structure is stabilized by classical inter­molecular N—H⋯O hydrogen bonds

1-Ethyl-4-hydr­oxy-9-aza­tricyclo­[7.4.1.02,7]tetra­deca-2,4,6-trien-8-one

In the mol­ecule of the title compound, C15H19NO2, the six-membered dihydro­pyridinone ring assumes a screw-boat conformation. In the crystal structure, mol­ecules are linked via O—H⋯O hydrogen bonding between hydr­oxy and carbonyl groups, forming supra­molecular chains along the a axis

2-Methyl-1,2,3,4-tetra­hydro­isoquinolin-6-yl N-phenyl­carbamate

In the mol­ecule of the title compound, C17H18N2O2, the piperidine ring adopts a half-chair form. The two benzene rings are individually planar and make a dihedral angle of 53.90°. The crystal structure is stabilized by inter­molecular N—H⋯N hydrogen bonds and π–π stacking inter­actions (centroid–centroid distance = 3.962 Å)

(3S,4R)-3-Ethyl-4-hydr­oxy-3-(3-methoxy­phen­yl)-1-methyl­azepanium (2R,3R)-2,3-bis­(benzo­yloxy)-3-carboxy­propionate

The crystal structure of the title compound, C16H26NO2 +·C18H13O8 −, is stabilized by an extensive network of classical N—H⋯O and O—H⋯O hydrogen bonding. The crystal structure also shows an ammonium-driven diastereo­isomerism

(E)-6-Meth­oxy-9-methyl-1,2,3,4-tetra­hydro-9H-carbazol-4-one oxime

The title compound, C14H16N2O2, is dimerized by inversion-related inter­molecular O—H⋯O and O—H⋯N hydrogen bonding. There is also an intra­molecular C—H⋯N bond, resulting in a six-membered ring

(3S,4S)-3-Ethyl-4-hydr­oxy-3-(3-methoxy­phen­yl)-1-methyl­azepan-1-ium d-tartrate dihydrate

In the title compound, C16H26NO2 +·C4H5O6 −·2H2O, a meptaz­inol derivative, three C atoms of the azepane ring are disordered over two positions, with site-occupancy factors of 0.80 and 0.20; the major disorder component adopts a twist-chair conformation, while the minor component has a chair conformation. The benzene ring is axially substituted on the heterocyclic ring, resulting in a folded conformation of the cation. The absolute configuration was determined with reference to d-tartaric acid. The crystal structure is stabilized by an extensive network of intra- and inter­molecular O—H⋯O hydrogen bonds