27216
For trapping with NaNCBH3 , it is deduced that the reaction likely occurs with the iminium ion that is in protonic equilibrium with its conjugate base imine .
 Chemical: NaNCBH3; Chemical: iminium; Chemical: imine
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: NaNCBH3, iminium, imine 
Answer:
 Chemical: NaNCBH3; Chemical: iminium; Chemical: imine