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: Such systemic lipopolysaccharide treatment mitigated methamphetamine - induced striatal dopamine and 3 , 4 - dihydroxyphenylacetic acid depletions in a dose - dependent manner .
### Output Text:
Such systemic <span class="chemical">lipopolysaccharide</span> treatment mitigated <span class="chemical">methamphetamine</span> - induced striatal <span class="chemical">dopamine</span> and <span class="chemical">3 , 4 - dihydroxyphenylacetic acid</span> depletions in a dose - dependent manner . 