9822
Compared with the earlier adamantyl - containing urea - based inhibitors , substituted phenyl - containing urea - based inhibitors afford more favorable PK properties , such as higher Cmaxs , larger AUCs and longer t1 / 2s , which , as expected , show more stable metabolic stability .
 Chemical: adamantyl; Chemical: urea; Chemical: phenyl; Chemical: urea
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: adamantyl; Chemical: urea; Chemical: phenyl; Chemical: urea