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: Incorrect diagnosis of the syndrome will lead to a significant reduction of life quality in patients suffering from CIPS .
### Output Text:
Incorrect diagnosis of the syndrome will lead to a significant reduction of life quality in patients suffering from CIPS . 