In the sentence extracted from biomedical literature, identify all the chemical entities. The required answer format is the same sentence with HTML <span> tags to mark up specific entities. 
### Entity Markup Guides:
Use <span class="chemical"> to denote a chemical.

### Input Text: PD female rats also showed increased ( 3 ) H - haloperidol binding and decreased dopamine transporter binding in striatum .
### Output Text:
PD female rats also showed increased ( 3 ) <span class="chemical">H</span> - <span class="chemical">haloperidol</span> binding and decreased <span class="chemical">dopamine</span> transporter binding in striatum . 