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: In conclusion , SM - 5887 does not have any potential of chronic cardiotoxicity and deteriorating effect on doxorubicin - induced cardiotoxicity in dogs .
### Output Text:
In conclusion , <span class="chemical">SM - 5887</span> does not have any potential of chronic cardiotoxicity and deteriorating effect on <span class="chemical">doxorubicin</span> - induced cardiotoxicity in dogs . 