2690
Finally M4 was identified as [ ( 2R ) - 2 - fluoro - 3 - guanidino - propyl ] - phosphinic acid .
 Chemical: [ ( 2R ) - 2 - fluoro - 3 - guanidino - propyl ] - phosphinic acid
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: [ ( 2R ) - 2 - fluoro - 3 - guanidino - propyl ] - phosphinic acid