(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
meaning "to cut",:241
of steroid, meaning "solid, three-dimensional".:129
Secosteroids are alternatively described as a subclass of steroids
or derived from steroids.
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).
Some nonsteroidal estrogens, like doisynolic acid and allenolic acid, are also secosteroids or secosteroid-like compounds.
This page was last edited on 14 October 2017, at 21:07 (UTC)
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