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: A case of acute renal failure , due to occlusion of renal vessels in a patient with acute promyelocytic leukemia ( APL ) treated with all - trans - retinoic acid ( ATRA ) and tranexamic acid has been described recently .
### Output Text:
A case of acute renal failure , due to occlusion of renal vessels in a patient with acute promyelocytic leukemia ( APL ) treated with <span class="chemical">all - trans - retinoic acid</span> ( <span class="chemical">ATRA</span> ) and <span class="chemical">tranexamic acid</span> has been described recently . 