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: Moreover , test conditions can impact upon other physiological responses to apomorphine such as drug - induced hypothermia .
### Output Text:
Moreover , test conditions can impact upon other physiological responses to <span class="chemical">apomorphine</span> such as drug - induced hypothermia . 