Metandienone Wikipedia
For http://easywebgames.com/ a single‐substituted benzene the general empirical formula is
[
\boxed\; \mathrmC_6H_5\,R\;
]
i.e. a phenyl group (C₆H₅) attached to a substituent R.
(If you want an example: chlorobenzene is C₆H₅Cl.)