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 therapeutic use of selective DA D1 receptor agonists such as SKF - 82958 ( 6 - chloro - 7 , 8 - dihydroxy - 3 - allyl - 1 - phenyl - 2 , 3 , 4 , 5 - tetrahydro - 1H - 3 - benzaze pine hydrobromide ) and A - 77636 ( [ 1R , 3S ] 3 - [ 1 ' - admantyl ] - 1 - aminomethyl - 3 , 4 - dihydro - 5 , 6 - dihydroxy - 1H - 2 - benzo pyran hydrochloride ) seems limited because of their duration of action , which is too short for SKF - 82958 ( < 1 hr ) and too long for A - 77636 ( > 20 hr , leading to behavioral tolerance ) .
### Output Text:
The therapeutic use of selective <span class="chemical">DA</span> D1 receptor agonists such as <span class="chemical">SKF - 82958</span> ( <span class="chemical">6 - chloro - 7 , 8 - dihydroxy - 3 - allyl - 1 - phenyl - 2 , 3 , 4 , 5 - tetrahydro - 1H - 3 - benzaze pine hydrobromide</span> ) and <span class="chemical">A - 77636</span> ( <span class="chemical">[ 1R , 3S ] 3 - [ 1 ' - admantyl ] - 1 - aminomethyl - 3 , 4 - dihydro - 5 , 6 - dihydroxy - 1H - 2 - benzo pyran hydrochloride</span> ) seems limited because of their duration of action , which is too short for <span class="chemical">SKF - 82958</span> ( < 1 hr ) and too long for <span class="chemical">A - 77636</span> ( > 20 hr , leading to behavioral tolerance ) . 