19767
Synthesis and anti - acetylcholinesterase properties of novel beta - and gamma - substituted alkoxy organophosphonates .
 Chemical: beta - and gamma - substituted alkoxy organophosphonates
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: beta - and gamma - substituted alkoxy organophosphonates