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: Neuroprotection rendered by MPEP may be associated with the reduction of the methamphetamine - induced dopamine efflux in the striatum due to the blockade of extrastriatal mGluR5 , and with a decrease in hyperthermia .
### Output Text:
Neuroprotection rendered by <span class="chemical">MPEP</span> may be associated with the reduction of the <span class="chemical">methamphetamine</span> - induced <span class="chemical">dopamine</span> efflux in the striatum due to the blockade of extrastriatal mGluR5 , and with a decrease in hyperthermia . 