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: The present case highlights the possibility that differential diagnosis between an amiodarone - related pulmonary lesion and a neoplasm can be very difficult radiologically , and suggests that membranous glomerulonephritis might be another possible complication of amiodarone treatment .
### Output Text:
The present case highlights the possibility that differential diagnosis between an <span class="chemical">amiodarone</span> - related pulmonary lesion and a neoplasm can be very difficult radiologically , and suggests that membranous glomerulonephritis might be another possible complication of <span class="chemical">amiodarone</span> treatment . 