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: Pilocarpine on either day induced status epilepticus ; status epilepticus at P45 resulted in CA3 cell loss and spontaneous seizures , whereas P20 rats had no cell loss or spontaneous seizures .
### Output Text:
<span class="chemical">Pilocarpine</span> on either day induced status epilepticus ; status epilepticus at P45 resulted in CA3 cell loss and spontaneous seizures , whereas P20 rats had no cell loss or spontaneous seizures . 