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: Use of glycopyrronium 5 micrograms kg - 1 provided greater cardiovascular stability and , given 1 min before the edrophonium , was sufficient to minimize early , edrophonium - induced bradycardias .
### Output Text:
Use of <span class="chemical">glycopyrronium</span> 5 micrograms kg - 1 provided greater cardiovascular stability and , given 1 min before the <span class="chemical">edrophonium</span> , was sufficient to minimize early , <span class="chemical">edrophonium</span> - induced bradycardias . 