23554
We performed chemical modifications of ifenprodil at the benzylic position and on the phenol ring by introducing secondary amine or amide functions and evaluated alkyl chains from two to 20 bonds either including or not including secondary amide functions as spacers .
 Chemical: ifenprodil; Chemical: benzylic; Chemical: phenol; Chemical: secondary amine or amide; Chemical: secondary amide
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: ifenprodil; Chemical: benzylic; Chemical: phenol; Chemical: secondary amine or amide; Chemical: secondary amide