Metribolone
（重定向自Methyltrienolone）
Metribolone, (also known as methyltrienolone or R1881) is a potent, non-aromatizable androgen which has also been used as a photoaffinity label for the androgen receptor. It is the 17-methylated derivative of trenbolone, and is a similarly potent anabolic steroid, but with high hepatotoxicity.