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: Reverse or inverted left ventricular apical ballooning syndrome ( reverse Takotsubo cardiomyopathy ) in a young woman in the setting of amphetamine use .
### Output Text:
Reverse or inverted left ventricular apical ballooning syndrome ( reverse Takotsubo cardiomyopathy ) in a young woman in the setting of <span class="chemical">amphetamine</span> use . 