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: Biochemical liver function tests indicated hepatocellular necrosis and correlated with histopathological evidence of hepatic injury , the spectrum of which ranged from fatty change and focal hepatocellular necrosis to massive hepatic necrosis .
### Output Text:
Biochemical liver function tests indicated hepatocellular necrosis and correlated with histopathological evidence of hepatic injury , the spectrum of which ranged from fatty change and focal hepatocellular necrosis to massive hepatic necrosis . 