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: An increase in blood pressure , accompanied by atrial fibrillation , agitation , incomprehensible shouts and loss of consciousness , was observed in an elderly , ASA classification group II , cardiovascularly medicated male , 12 min after performance of axillary block with mepivacaine 850 mg containing adrenaline 0 . 225 mg , for correction of Dupuytren ' s contracture .
### Output Text:
An increase in blood pressure , accompanied by atrial fibrillation , agitation , incomprehensible shouts and loss of consciousness , was observed in an elderly , ASA classification group II , cardiovascularly medicated male , 12 min after performance of axillary block with <span class="chemical">mepivacaine</span> 850 mg containing <span class="chemical">adrenaline</span> 0 . 225 mg , for correction of Dupuytren ' s contracture . 