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The hydroxy group further stabilizes the molecule by an O <F8FF> H . . . N intramolecular hydrogen bond , which , in turn , forces the N - methyl group to the less stable axial form .
 hydroxy, O <F8FF> H, N, hydrogen, N - methyl
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 hydroxy, O <F8FF> H, N, hydrogen, N - methyl