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: Using this rationale , the 8 - aminoquinoline WR242511 , a potent long - lasting MHb former in rodents and beagle dogs , was studied in the rhesus monkey for advanced development as a potential CN pretreatment .
### Output Text:
Using this rationale , the <span class="chemical">8 - aminoquinoline</span> <span class="chemical">WR242511</span> , a potent long - lasting MHb former in rodents and beagle dogs , was studied in the rhesus monkey for advanced development as a potential CN pretreatment . 