4285
Small interfering RNA directed BDNF , orexin - A , and SB334867 [ N - ( 2 - methyl - 6 - benzoxazolyl ) - N ' - 1 , 5 - naphthyridin - 4 - yl urea ; a specific orexin - 1 receptor antagonist ] were administered directly into the hypothalamus .
 SB334867, N - ( 2 - methyl - 6 - benzoxazolyl ) - N ' - 1 , 5 - naphthyridin - 4 - yl urea
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 SB334867, N - ( 2 - methyl - 6 - benzoxazolyl ) - N ' - 1 , 5 - naphthyridin - 4 - yl urea