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: These findings suggest that glutamate - mediated mechanisms in the neural circuits at the IC level influence haloperidol - induced catalepsy and participate in the regulation of motor activity .
### Output Text:
These findings suggest that <span class="chemical">glutamate</span> - mediated mechanisms in the neural circuits at the IC level influence <span class="chemical">haloperidol</span> - induced catalepsy and participate in the regulation of motor activity . 