4431
Precipitation of Ibuprofen Sodium using compressed carbon dioxide as antisolvent .
 Chemical: Ibuprofen Sodium; Chemical: carbon dioxide
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: Ibuprofen Sodium; Chemical: carbon dioxide