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: Five cases of paranoid exacerbation with the serotonin reuptake inhibitors fluoxetine and amitriptyline are reported here .
### Output Text:
Five cases of paranoid exacerbation with the <span class="chemical">serotonin</span> reuptake inhibitors <span class="chemical">fluoxetine</span> and <span class="chemical">amitriptyline</span> are reported here . 