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: Myo - inositol - 1 - phosphate ( MIP ) synthase inhibition : in - vivo study in rats .
### Output Text:
<span class="chemical">Myo - inositol - 1 - phosphate</span> ( <span class="chemical">MIP</span> ) synthase inhibition : in - vivo study in rats . 