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 SHR but not in WKY administration of ANP , AVP and ANP + AVP decreased CCB during Phe - induced MAP elevation .
### Output Text:
In SHR but not in WKY administration of ANP , <span class="chemical">AVP</span> and ANP + <span class="chemical">AVP</span> decreased CCB during <span class="chemical">Phe</span> - induced MAP elevation . 