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: Furthermore , DCE reversed the amnesia induced by scopolamine ( 0 . 4 mg / kg , i . p . ) and diazepam ( 1 mg / kg , i . p . ) .
### Output Text:
Furthermore , <span class="chemical">DCE</span> reversed the amnesia induced by <span class="chemical">scopolamine</span> ( 0 . 4 mg / kg , i . p . ) and <span class="chemical">diazepam</span> ( 1 mg / kg , i . p . ) . 