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: Thus , our data suggest that the kinin B2 receptor is involved in cisplatin - induced acute kidney injury by mediating the necrotic process and the expression of inflammatory cytokines , thus resulting in declined renal function .
### Output Text:
Thus , our data suggest that the kinin B2 receptor is involved in <span class="chemical">cisplatin</span> - induced acute kidney injury by mediating the necrotic process and the expression of inflammatory cytokines , thus resulting in declined renal function . 