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: These findings are strong support for the adrenaline - hypertension hypothesis in man .
### Output Text:
These findings are strong support for the <span class="chemical">adrenaline</span> - hypertension hypothesis in man . 