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: We found that maltolyl p - coumarate significantly decreased apoptotic cell death and reduced reactive oxygen species , cytochrome c release , and caspase 3 activation .
### Output Text:
We found that <span class="chemical">maltolyl p - coumarate</span> significantly decreased apoptotic cell death and reduced reactive oxygen species , cytochrome c release , and caspase 3 activation . 