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: Our results suggest that the suppression of gallbladder contractility is the cause of the successive formation of bile sludge , gallstones , and cholecystitis during octreotide therapy in Chinese acromegalic patients .
### Output Text:
Our results suggest that the suppression of gallbladder contractility is the cause of the successive formation of bile sludge , gallstones , and cholecystitis during <span class="chemical">octreotide</span> therapy in Chinese acromegalic patients . 