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: In these animals , abecarnil produced a paralleled dose - dependent ( 0 . 05 - 1 mg / kg i . p . ) reduction of both motor behavior and cortical [ 35S ] TBPS binding .
### Output Text:
In these animals , <span class="chemical">abecarnil</span> produced a paralleled dose - dependent ( 0 . 05 - 1 mg / kg i . p . ) reduction of both motor behavior and cortical [ 35S ] TBPS binding . 