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: The remaining 1 patient ( 20 . 0 % ) showed lower than normal ADC value and showed incomplete resolution with cortical laminar necrosis .
### Output Text:
The remaining 1 patient ( 20 . 0 % ) showed lower than normal ADC value and showed incomplete resolution with cortical laminar necrosis . 