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: In the in vivo study , the administration ( 50 mg / kg , i . p . ) of TET and FAN in mice showed the inhibition of thrombosis by 55 % and 35 % , respectively , while acetylsalicylic acid ( ASA , 50 mg / kg , i . p . ) , a positive control , showed only 30 % inhibition .
### Output Text:
In the in vivo study , the administration ( 50 mg / kg , i . p . ) of <span class="chemical">TET</span> and <span class="chemical">FAN</span> in mice showed the inhibition of thrombosis by 55 % and 35 % , respectively , while <span class="chemical">acetylsalicylic acid</span> ( <span class="chemical">ASA</span> , 50 mg / kg , i . p . ) , a positive control , showed only 30 % inhibition . 