2037
Antithrombin ( 50 or 500 IU / kg / i . v . ) was administered to rats once a day for 10 days immediately after the injection of puromycin aminonucleoside ( 50 mg / kg / i . v . ) .
 Chemical: puromycin aminonucleoside
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: puromycin aminonucleoside