testosterone sterol ester testosterone cypionate http://purl.bioontology.org/ontology/RXNORM/835827 http://purl.bioontology.org/ontology/SNOMEDCT/109034005 http://purl.obolibrary.org/obo/CHEBI_9463 http://purl.obolibrary.org/obo/NCIT_C1246 https://en.wikipedia.org/wiki/Testosterone_cypionate https://www.wikidata.org/wiki/Q27108401 An eight-carbon ester form of testosterone. The number of ester carbon atoms correlate with the half-life of the prodrug. Testosterone inhibits gonadotropin secretion from the pituitary gland and ablates estrogen production in the ovaries, thereby decreasing endogenous estrogen levels. In addition, this agent promotes the maintenance of male sex characteristics and is indicated for testosterone replacement in hypogonadal males. testosterone ester