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: The number of p75 ( NTR ) - immunoreactive ( - IR ) cells in the lumbosacral dorsal root ganglia ( DRG ) also increased ( P < or = 0 . 05 ) with CYP - induced cystitis ( acute , intermediate , and chronic ) .
### Output Text:
The number of p75 ( NTR ) - immunoreactive ( - IR ) cells in the lumbosacral dorsal root ganglia ( DRG ) also increased ( P < or = 0 . 05 ) with <span class="chemical">CYP</span> - induced cystitis ( acute , intermediate , and chronic ) . 