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: Two cases of deliberate self - poisoning with 5 g and 3 . 6 g of amisulpride , respectively , are reported .
### Output Text:
Two cases of deliberate self - poisoning with 5 g and 3 . 6 g of <span class="chemical">amisulpride</span> , respectively , are reported . 