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: Surprisingly , the first dose of 50 mg of losartan resulted in a sudden anuria , which lasted eight hours despite high - dose furosemide and amine infusion .
### Output Text:
Surprisingly , the first dose of 50 mg of <span class="chemical">losartan</span> resulted in a sudden anuria , which lasted eight hours despite high - dose <span class="chemical">furosemide</span> and <span class="chemical">amine</span> infusion . 