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: One month previously , she had taken a single high dose of disulfiram ( 130 tablets of ALCOHOL STOP TAB , Shin - Poong Pharm . Co . , Ansan , Korea ) in a suicide attempt .
### Output Text:
One month previously , she had taken a single high dose of <span class="chemical">disulfiram</span> ( 130 tablets of <span class="chemical">ALCOHOL</span> STOP TAB , Shin - Poong Pharm . Co . , Ansan , Korea ) in a suicide attempt . 