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: Galanthamine hydrobromide , a longer acting anticholinesterase drug , in the treatment of the central effects of scopolamine ( Hyoscine ) .
### Output Text:
<span class="chemical">Galanthamine hydrobromide</span> , a longer acting anticholinesterase drug , in the treatment of the central effects of <span class="chemical">scopolamine</span> ( <span class="chemical">Hyoscine</span> ) . 