2849
Additionally , elzasonan was shown to be metabolized to the novel cyclized indole metabolite ( M6 ) which undergoes subsequent oxidation to form the iminium ion metabolite ( M3a ) .
 Chemical: elzasonan; Chemical: indole; Chemical: iminium
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: elzasonan, indole, iminium 
Answer:
 Chemical: elzasonan; Chemical: indole; Chemical: iminium