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: To better correlate the biochemical and the pharmacological effects , we studied the action of abecarnil on [ 35S ] TBPS binding , exploratory motility and on isoniazid - induced biochemical and pharmacological effects in mice .
### Output Text:
To better correlate the biochemical and the pharmacological effects , we studied the action of <span class="chemical">abecarnil</span> on <span class="chemical">[ 35S ] TBPS</span> binding , exploratory motility and on <span class="chemical">isoniazid</span> - induced biochemical and pharmacological effects in mice . 