Term Name:	C21-steroid
Synonyms:	a C(21)-steroid
Definition:	A steroid that has a structure based on a 21-carbon (pregnane) skeleton. Note that individual examples may have ring substituents at other positions and/or contain double bonds, aromatic A-rings, expanded/contracted rings etc., so the formula and mass may vary from that given for the generic structure.
Ontology:	ChEBI [CHEBI:61313]  ( EBI )