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: CONCLUSIONS : Crocin may be considered as a novel protective agent in diazinon - induced hyperlipemia through modulating of ERK pathway and increase of LDLr expression .
### Output Text:
CONCLUSIONS : <span class="chemical">Crocin</span> may be considered as a novel protective agent in <span class="chemical">diazinon</span> - induced hyperlipemia through modulating of ERK pathway and increase of LDLr expression . 