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: Moreover , post - treatment with LR132 prevented cocaine - induced lethality in a significant proportion of animals .
### Output Text:
Moreover , post - treatment with <span class="chemical">LR132</span> prevented <span class="chemical">cocaine</span> - induced lethality in a significant proportion of animals . 