2886
Single oral administrations of up to 500 mu g of vilanterol were shown to be safe and well tolerated in two clinical studies in healthy men .
 Chemical: vilanterol
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: vilanterol