30245
In the case of activated esters , the process can also be viewed as water autoionization with formation of hydroxide ion aided by a second water moleculeacting as a general base ( WAIB mechanism ) .
 Chemical: hydroxide
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: hydroxide