218
Fragment ion 2f is formed from the parent ion 2a ( m / z 414 ; relative abundance , 21 % ) by sequential loss of CHCCl3 ( 2d , m / z 284 ; relative abundance , 10 % ) , SO3 ( 2e , m / z 204 ; relative abundance , 28 % ) and HCl ( 2f , m / z 168 ; relative abundance , 100 % ) .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
Answer:
 None