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: 243 cocaine - dependent outpatients with cocaine - induced mood disorder ( CIMD ) , other mood disorders , or no mood disorder were compared on measures of psychiatric symptoms .
### Output Text:
243 <span class="chemical">cocaine</span> - dependent outpatients with <span class="chemical">cocaine</span> - induced mood disorder ( CIMD ) , other mood disorders , or no mood disorder were compared on measures of psychiatric symptoms . 