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: Epinephrine 0 . 01 mg / kg was administered at 1 - min intervals while external cardiac compressions were applied .
### Output Text:
<span class="chemical">Epinephrine</span> 0 . 01 mg / kg was administered at 1 - min intervals while external cardiac compressions were applied . 