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: OBJECTIVES : To investigate the effects of subchronic L - NOARG treatment in haloperidol - induced catalepsy and the number of NOS neurons in areas related to motor control .
### Output Text:
OBJECTIVES : To investigate the effects of subchronic <span class="chemical">L - NOARG</span> treatment in <span class="chemical">haloperidol</span> - induced catalepsy and the number of NOS neurons in areas related to motor control . 