Fulvestrant (129453-61-8) is an estrogen receptor downregulator, this means it binds to the estrogen receptor site in competition with estrogen in the body.
Fulvestrant (129453-61-8) ni kidhibiti kipokezi cha estrojeni, hii ina maana kwamba hufungamana na tovuti ya kipokezi cha estrojeni katika kushindana na estrojeni mwilini.