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: Therefore , DCE may prove to be a useful remedy for the management of cognitive dysfunctions on account of its multifarious beneficial effects such as , memory improving property , cholesterol lowering property and anticholinesterase activity .
### Output Text:
Therefore , <span class="chemical">DCE</span> may prove to be a useful remedy for the management of cognitive dysfunctions on account of its multifarious beneficial effects such as , memory improving property , <span class="chemical">cholesterol</span> lowering property and anticholinesterase activity . 