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: Diuretic therapy was likewise associated with a greater risk of decreased renal function in the enalapril group ( RR 1 . 89 , 95 % CI 1 . 70 - 2 . 08 ) than in the placebo group ( RR 1 . 35 , 95 % CI 1 . 09 - 1 . 66 ) .
### Output Text:
<span class="chemical">Diuretic</span> therapy was likewise associated with a greater risk of decreased renal function in the <span class="chemical">enalapril</span> group ( RR 1 . 89 , 95 % CI 1 . 70 - 2 . 08 ) than in the placebo group ( RR 1 . 35 , 95 % CI 1 . 09 - 1 . 66 ) . 