DRD2
DRD2 gene — the molecular target that 1 compounds in the wiki act on.
In one line: A dopamine receptor used to control the hormone prolactin.
DRD2 (the dopamine D2 receptor) has many roles, but one practical use stands out: dopamine acting here tells the body to lower prolactin, a hormone that, when too high, kills libido and causes other problems. Certain steroids (the "19-nor" family, like nandrolone) raise prolactin, so users take a drug called cabergoline that switches on this receptor to keep prolactin in check.
Simply: press this dopamine button, and prolactin comes down.