3542
Two samples were studied : 12 patients received oxitropium at 600 micrograms ( 6 subjects ) or at 400 micrograms t . i . d .
 Chemical: oxitropium
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: oxitropium