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: CASE SUMMARY : A 25 - year - old male patient , with a height of 175 cm and weight of 72 kg presented to Marmara University Hospital Emergency Department , Istanbul , Turkey , with 5 days ' history of jaundice , malaise , nausea , and vomiting .
### Output Text:
CASE SUMMARY : A 25 - year - old male patient , with a height of 175 cm and weight of 72 kg presented to Marmara University Hospital Emergency Department , Istanbul , Turkey , with 5 days ' history of jaundice , malaise , nausea , and vomiting . 