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: On admission , laboratory examination showed Plasmodium falciparum ( + + + + ) , total bilirubin 8 . 25 mg / dL , conjugated bilirubin 4 . 36 mg / dL , unconjugated bilirubin 3 . 89 mg / dL , potassium 3 . 52 meq / L Patient was diagnosed as severe malaria with jaundice and got quinine infusion in dextrose 5 % 500 mg / 8 hour .
### Output Text:
On admission , laboratory examination showed Plasmodium falciparum ( + + + + ) , total <span class="chemical">bilirubin</span> 8 . 25 mg / dL , conjugated <span class="chemical">bilirubin</span> 4 . 36 mg / dL , unconjugated <span class="chemical">bilirubin</span> 3 . 89 mg / dL , <span class="chemical">potassium</span> 3 . 52 meq / L Patient was diagnosed as severe malaria with jaundice and got <span class="chemical">quinine</span> infusion in <span class="chemical">dextrose</span> 5 % 500 mg / 8 hour . 