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: We describe a patient who developed dilated cardiomyopathy and clinical congestive heart failure after 2 months of therapy with amphotericin B ( AmB ) for disseminated coccidioidomycosis .
### Output Text:
We describe a patient who developed dilated cardiomyopathy and clinical congestive heart failure after 2 months of therapy with <span class="chemical">amphotericin B</span> ( <span class="chemical">AmB</span> ) for disseminated coccidioidomycosis . 