1417
Docking studies indicated that all 4 - anilinoquinazoline derivatives could be inserted into the ATP - binding pocket of the EGFR via indirect docking , and that the modifications at the 3 ' - position of the anilino group and 6 - alkoxy site of the quinazoline ring have little interference with the formation of the two essential H - bonds between the N3 of the quinazoline ring and Thr766 through a water molecule , and the N1 of the quinazoline ring and N - H of Met769 .
 Chemical: 4 - anilinoquinazoline; Chemical: ATP; Chemical: anilino; Chemical: 6 - alkoxy; Chemical: quinazoline; Chemical: H; Chemical: quinazoline; Chemical: Thr766; Chemical: quinazoline; Chemical: N - H; Chemical: Met769
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: 4 - anilinoquinazoline; Chemical: ATP; Chemical: anilino; Chemical: 6 - alkoxy; Chemical: quinazoline; Chemical: H; Chemical: quinazoline; Chemical: Thr766; Chemical: quinazoline; Chemical: N - H; Chemical: Met769