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 effects of dizocilpine ( MK - 801 ) , a noncompetitive N - methyl - D - aspartate ( NMDA ) receptor antagonist , were studied on dopamine - related behaviors induced by reserpine treatments .
### Output Text:
The effects of <span class="chemical">dizocilpine</span> ( <span class="chemical">MK - 801</span> ) , a noncompetitive <span class="chemical">N - methyl - D - aspartate</span> ( <span class="chemical">NMDA</span> ) receptor antagonist , were studied on <span class="chemical">dopamine</span> - related behaviors induced by <span class="chemical">reserpine</span> treatments . 