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: The combinations of loreclezole ( 2 . 5 mg / kg ) with valproate , clonazepam , or carbamazepine ( applied at their subprotective doses ) also exhibited antiseizure effect in this test .
### Output Text:
The combinations of <span class="chemical">loreclezole</span> ( 2 . 5 mg / kg ) with <span class="chemical">valproate</span> , <span class="chemical">clonazepam</span> , or <span class="chemical">carbamazepine</span> ( applied at their subprotective doses ) also exhibited antiseizure effect in this test . 