1746
It is found that all complex formations are enthalpically favored , and the stability of the H - bonds comes in the order of S1 - H2 . . . N2 > N2 - H2 . . . S1 > N3 - H3B . . . O1 .
 H, S1, H2, N2, N2, H2, S1, N3, H3B, O1
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 H, S1, H2, N2, N2, H2, S1, N3, H3B, O1