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: Efficacy of everolimus ( RAD001 ) in patients with advanced NSCLC previously treated with chemotherapy alone or with chemotherapy and EGFR inhibitors .
### Output Text:
Efficacy of <span class="chemical">everolimus</span> ( <span class="chemical">RAD001</span> ) in patients with advanced NSCLC previously treated with chemotherapy alone or with chemotherapy and EGFR inhibitors . 