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: In addition to muscle damage , severe damage was also seen in harderian glands , especially after exposure to mepivacaine and lidocaine plus epinephrine .
### Output Text:
In addition to muscle damage , severe damage was also seen in harderian glands , especially after exposure to <span class="chemical">mepivacaine</span> and <span class="chemical">lidocaine</span> plus <span class="chemical">epinephrine</span> . 