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: Brain and spinal cord NTE activities were measured in Long - Evans male rats 1 hr post - exposure to various dosages of Mipafox ( ip , 1 - 15 mg / kg ) .
### Output Text:
Brain and spinal cord NTE activities were measured in Long - Evans male rats 1 hr post - exposure to various dosages of <span class="chemical">Mipafox</span> ( ip , 1 - 15 mg / kg ) . 