21498
gamma range within 0 . 05 - 1 for [ OH ] = 2 . 6 x 10 ( 7 ) - 3 x 10 ( 9 ) molecule cm ( - 3 ) for all investigated organic compounds , but decrease to 0 . 008 - 0 . 034 for [ OH ] = 4 . 1 x 10 ( 10 ) - 6 . 7 x 10 ( 10 ) molecule cm ( - 3 ) .
 Chemical: OH; Chemical: OH
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: OH; Chemical: OH