19975
The accumulation of [ ( 18 ) F ] FDG was increased in the rat RS / PC cortex region showing neuronal cell degeneration / death and detected before the onset of neuronal cell death .
 [ ( 18 ) F ] FDG
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 [ ( 18 ) F ] FDG