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: KF17837 also reduced the catalepsy induced by haloperidol ( 1 mg / kg i . p . ) and by reserpine ( 5 mg / kg i . p . ) .
### Output Text:
<span class="chemical">KF17837</span> also reduced the catalepsy induced by <span class="chemical">haloperidol</span> ( 1 mg / kg i . p . ) and by <span class="chemical">reserpine</span> ( 5 mg / kg i . p . ) . 