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Tumor cells activate pathways that facilitate and stimulate glycolysis even in the presence of adequate levels of oxygen in order to satisfy their continuous need of molecules , such as nucleotides , ATP and fatty acids , necessary to support their rapid proliferation .
 oxygen, ATP, fatty acids
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 oxygen, ATP, fatty acids