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: Furthermore ameliorating effect of crocin on diazinon induced disturbed cholesterol homeostasis was studied .
### Output Text:
Furthermore ameliorating effect of <span class="chemical">crocin</span> on <span class="chemical">diazinon</span> induced disturbed <span class="chemical">cholesterol</span> homeostasis was studied . 