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: Here its ability to antagonize the prolonged depletion of dopamine in the striatum by amphetamine in iprindole - treated rats is reported .
### Output Text:
Here its ability to antagonize the prolonged depletion of <span class="chemical">dopamine</span> in the striatum by <span class="chemical">amphetamine</span> in <span class="chemical">iprindole</span> - treated rats is reported . 