24701
The formation of CxF2x + 1CH2C ( O ) OONO2 ( x = 1 , 6 ) from the photooxidation of CxF2x + 1CH2C ( O ) H ( x = 1 , 6 ) in the presence of NO2 was investigated .
 Chemical: CxF2x + 1CH2C ( O ) OONO2; Chemical: CxF2x + 1CH2C ( O ) H; Chemical: NO2
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: CxF2x + 1CH2C ( O ) OONO2, CxF2x + 1CH2C ( O ) H, NO2 
Answer:
 Chemical: CxF2x + 1CH2C ( O ) OONO2; Chemical: CxF2x + 1CH2C ( O ) H; Chemical: NO2