There is no compound called "phene". It seems like you might be referring to "benzene", a common aromatic hydrocarbon.

The structure formula of benzene is:

C6H6

Structural representation:

```

H

|

H--C--C--H

| |

H--C--C--H

|

H

```

This represents a six-membered ring with alternating single and double bonds, and one hydrogen atom attached to each carbon atom. This structure is often represented by a hexagon with a circle inside to signify the delocalized electrons in the ring.

Let me know if you had a different compound in mind!