Tetracyclic
{{Short description|Organic compound having 4 fused rings}}
{{For|flowers constructed of four whorls|cyclic flower}}
File:Doxycycline structure.svg
Tetracyclics are cyclic chemical compounds that contain four fused rings of atoms, for example, Tröger's base.
Some tricyclic compounds having three fused and one tethered ring (connected to main nucleus by a single bond) can also classified as tetracyclic, for example, ciclazindol.{{Cite journal |last=Wheatley |first=David |date=1982-05-01 |title=A new weight-reducing drug with novel properties |url=https://pmj.bmj.com/content/58/679/279 |journal=Postgraduate Medical Journal |language=en |volume=58 |issue=679 |pages=279–281 |doi=10.1136/pgmj.58.679.279 |issn=0032-5473 |pmid=7050949|pmc=2426414 }}
Tetracyclic compounds have various pharmaceutical uses, such as:
- tetracycline antibiotics
- Doxycycline
- Tigecycline
- Omadacycline
- Eravacycline
- tetracyclic antidepressants
- Benzoctamine
- Loxapine
- Mazindol
- Mianserin
- Mirtazapine{{cite book|last1=Jilani |first1=Talha N. |title=Mirtazapine |date=2022 |url=https://www.ncbi.nlm.nih.gov/books/NBK519059/#:~:text=Mirtazapine%20is%20an%20atypical%20antidepressant,release%20of%20serotonin%20and%20norepinephrine. |work=StatPearls |place=Treasure Island (FL) |publisher=StatPearls Publishing |pmid=30085601 |access-date=2023-01-03 |last2=Gibbons |first2=Jonathan R. |last3=Faizy |first3=Rubina M. |last4=Saadabadi |first4=Abdolreza}}