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: Cisplatin treatment has been adopted in some chemotherapies ; however , this drug can induce acute kidney injury due its ability to negatively affect renal function , augment serum levels of creatinine and urea , increase the acute tubular necrosis score and up - regulate cytokines ( e . g . , IL - 1b and TNF - a ) .
### Output Text:
<span class="chemical">Cisplatin</span> treatment has been adopted in some chemotherapies ; however , this drug can induce acute kidney injury due its ability to negatively affect renal function , augment serum levels of <span class="chemical">creatinine</span> and <span class="chemical">urea</span> , increase the acute tubular necrosis score and up - regulate cytokines ( e . g . , IL - 1b and TNF - a ) . 