14117
Similarly , the Tyramine 1 subgroup of receptors ( or Octopamine / Tyramine receptors ) are better activated by tyramine than octopamine .
 Tyramine, Octopamine, Tyramine, tyramine, octopamine
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 Tyramine, Octopamine, Tyramine, tyramine, octopamine