957
Water - insoluble drug ibuprofen was dispersed in deionized water , and then the ion - exchange fibers in OH ( - ) type was immersed in it .
 Chemical: ibuprofen; Chemical: OH ( - )
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; Chemical: OH ( - )