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: Also , captopril treatment failed to potentiate or facilitate development of massive proteinuria invoked by puromycin aminonucleoside in SHR .
### Output Text:
Also , <span class="chemical">captopril</span> treatment failed to potentiate or facilitate development of massive proteinuria invoked by <span class="chemical">puromycin aminonucleoside</span> in SHR . 