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: Monosodium glutamate ( MSG ) administration to neonatal rodents produces convulsions and results in numerous biochemical and behavioral deficits .
### Output Text:
<span class="chemical">Monosodium glutamate</span> ( <span class="chemical">MSG</span> ) administration to neonatal rodents produces convulsions and results in numerous biochemical and behavioral deficits . 