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 the preceding months she had received neo - adjuvant chemotherapy with epirubicin , paclitaxel ( Taxol ) and cyclophosphamide .
### Output Text:
In the preceding months she had received neo - adjuvant chemotherapy with <span class="chemical">epirubicin</span> , <span class="chemical">paclitaxel</span> ( <span class="chemical">Taxol</span> ) and <span class="chemical">cyclophosphamide</span> . 