Secosteroid

A secosteroid (sec·o·ster·oid, sek'ō-stēr'oyd) is a type of steroid with a "broken" ring. The word secosteroid derives from the verb Latin: secare meaning "to cut",[1]:241 and Latin: stere of steroid, meaning "solid, three-dimensional".[1]:129 Secosteroids are alternatively described as a subclass of steroids[2] or derived from steroids.[3]
Types or subclasses of secosteroids are defined by the carbon atoms of the parent steroid skeleton where the ring cleavage has taken place. For example, 9,10-secosteroids derived from cleavage of the bond between carbon atoms C9 and C10 of the steroid B-ring (similarly 5,6-secosteroids, 13,14-steroids, etc.).
The prototypical secosteroid is cholecalciferol, vitamin D3.[4]
References
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External links
- Secosteroids at the US National Library of Medicine Medical Subject Headings (MeSH)
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