21184
Compounds of this new series , together with the previously published analogs without the fluorine atom on the 9 - benzyl group , constituted the starting dataset for the development of QSAR models .
 Chemical: fluorine; Chemical: 9 - benzyl
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: fluorine; Chemical: 9 - benzyl