6619
A new quantitative structure activity relationship ( QSAR ) model is established for oligopeptides that inhibit angiotensin I - converting enzyme ( ACE ) .
 Chemical: angiotensin I
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: angiotensin I