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: Glomeruli with sclerosis contained significantly more CC than non - sclerotic glomeruli in the same kidneys .
### Output Text:
Glomeruli with sclerosis contained significantly more CC than non - sclerotic glomeruli in the same kidneys . 