1938
The results showed marked tumor SPECT molecular imaging liabilities for both compounds but with a better performance by administration of ( 99m ) Tc - Dendrimer G ( 2 ) - Methionin .
 ( 99m ) Tc, Methionin
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 ( 99m ) Tc, Methionin