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: Infusions of epinephrine ( 4 mug per kilogram per minute for 6 hours ) increased radiocalcium uptakes into intact myocardium and each of its subcellular components with the mitochondrial fraction showing the most consistent changes when compared to saline - infused control animals ( 4 , 957 vs . 827 counts per minute per gram of dried tissue or fraction ) .
### Output Text:
Infusions of <span class="chemical">epinephrine</span> ( 4 mug per kilogram per minute for 6 hours ) increased <span class="chemical">radiocalcium</span> uptakes into intact myocardium and each of its subcellular components with the mitochondrial fraction showing the most consistent changes when compared to saline - infused control animals ( 4 , 957 vs . 827 counts per minute per gram of dried tissue or fraction ) . 