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: These results demonstrated that PCE could induce dysplasia of fetal kidneys as well as glomerulosclerosis of adult offspring , and the low functional programming of renal AT2R might mediate the developmental origin of adult glomerulosclerosis .
### Output Text:
These results demonstrated that PCE could induce dysplasia of fetal kidneys as well as glomerulosclerosis of adult offspring , and the low functional programming of renal AT2R might mediate the developmental origin of adult glomerulosclerosis . 