10599
The inhibitor adopts a horseshoe - like conformation , most likely due to a hydrophobic contact between the P4 phenyl ring and the P1 cyclohexyl group , which is further stabilized by an intramolecular hydrogen bond between the P1 guanidino group and the P4 carbonyl oxygen atom .
 Chemical: phenyl; Chemical: cyclohexyl; Chemical: hydrogen; Chemical: guanidino; Chemical: carbonyl oxygen
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: phenyl; Chemical: cyclohexyl; Chemical: hydrogen; Chemical: guanidino; Chemical: carbonyl oxygen