14499
Homopolar dihydrogen bonding in alkali metal amidoboranes : crystal engineering of low - dimensional molecular materials .
 dihydrogen, alkali metal amidoboranes
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 dihydrogen, alkali metal amidoboranes