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: The antipsychotic agent , remoxipride [ ( S ) - ( - ) - 3 - bromo - N - [ ( 1 - ethyl - 2 - pyrrolidinyl ) methyl ] - 2 , 6 - dimethoxybenz amide ] has been associated with acquired aplastic anemia .
### Output Text:
The antipsychotic agent , <span class="chemical">remoxipride</span> [ <span class="chemical">( S ) - ( - ) - 3 - bromo - N - [ ( 1 - ethyl - 2 - pyrrolidinyl ) methyl ] - 2 , 6 - dimethoxybenz amide</span> ] has been associated with acquired aplastic anemia . 