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: Therefore , 60 male rats were randomly assigned to receive daily injection of saline ( C ) , methylprednisolone ( M ) , or triamcinolone ( T ) 80 mg / kg / d for 5 d .
### Output Text:
Therefore , 60 male rats were randomly assigned to receive daily injection of saline ( C ) , <span class="chemical">methylprednisolone</span> ( <span class="chemical">M</span> ) , or <span class="chemical">triamcinolone</span> ( <span class="chemical">T</span> ) 80 mg / kg / d for 5 d . 