English: Structure of dosulepin based on CCDC ID 1160822 which is of dosulepin's hydrochloride salt. I converted the CIF file to SDF using Mercury. Then I removed the HCl atoms in Avogadro. Saved this in CML format. Then I opened the CML in Avogadro2 then "Perceived bonds", then I optimized its geometry with its final energy being 461.78. Here is the full citation:

Bandoli G, Nicolini M, Casellato U (1987). "Crystal structure of two tricyclic antidepressant drugs: Lofepramine hydrochloride and dothiepin hydrochloride". Journal of Crystallographic and Spectroscopic Research 17 (3): 281-293. DOI:10.1007/BF01161427.

Then the image was created in Jmol in POV-Ray format (with alpha transparency) and rendered with POV-Ray. Then cropped in GIMP.