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: Mean post - SCr increases were significantly less with iopamidol ( all patients : 0 . 07 versus 0 . 12 mg / dL , 6 . 2 versus 10 . 6 micromol / L , P = 0 . 03 ; patients with diabetes : 0 . 07 versus 0 . 16 mg / dL , 6 . 2 versus 14 . 1 micromol / L , P = 0 . 01 ) .
### Output Text:
Mean post - SCr increases were significantly less with <span class="chemical">iopamidol</span> ( all patients : 0 . 07 versus 0 . 12 mg / dL , 6 . 2 versus 10 . 6 micromol / L , P = 0 . 03 ; patients with diabetes : 0 . 07 versus 0 . 16 mg / dL , 6 . 2 versus 14 . 1 micromol / L , P = 0 . 01 ) . 