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 compared the pharmacokinetics , pharmacodynamics and safety profile of a new galenic formulation of propofol ( AM149 1 % ) , which does not contain soyabean oil , with a standard formulation of propofol ( Disoprivan 1 % ) .
### Output Text:
We compared the pharmacokinetics , pharmacodynamics and safety profile of a new galenic formulation of <span class="chemical">propofol</span> ( AM149 1 % ) , which does not contain soyabean oil , with a standard formulation of <span class="chemical">propofol</span> ( <span class="chemical">Disoprivan</span> 1 % ) . 