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: Both , Ro4368554 ( 3 and 10 mg / kg , intraperitoneally ( i . p . ) ) and metrifonate ( 10 mg / kg , p . o . , respectively ) reversed memory deficits induced by scopolamine and TRP depletion ( 10 mg / kg , i . p . , and 3 mg / kg , p . o . , respectively ) .
### Output Text:
Both , <span class="chemical">Ro4368554</span> ( 3 and 10 mg / kg , intraperitoneally ( i . p . ) ) and <span class="chemical">metrifonate</span> ( 10 mg / kg , p . o . , respectively ) reversed memory deficits induced by <span class="chemical">scopolamine</span> and <span class="chemical">TRP</span> depletion ( 10 mg / kg , i . p . , and 3 mg / kg , p . o . , respectively ) . 