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: CASE : We report the case of a 46 - year - old woman who received a liver transplant in our center as treatment for alcoholic cirrhosis and in whom either a fulminant course of posterior leukoencephalopathy or posterior reversible encephalopathy syndrome developed 110 days after transplant .
### Output Text:
CASE : We report the case of a 46 - year - old woman who received a liver transplant in our center as treatment for alcoholic cirrhosis and in whom either a fulminant course of posterior leukoencephalopathy or posterior reversible encephalopathy syndrome developed 110 days after transplant . 