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: A case of a patient with hepatocellular carcinoma that developed neutropenia after treatment with quetiapine is described here .
### Output Text:
A case of a patient with hepatocellular carcinoma that developed neutropenia after treatment with <span class="chemical">quetiapine</span> is described here . 