2253
Alkoxymetgyl - 3 , 4 - dimethylpyridinium chlorides were synthetized by reacting 3 , 4 - dimethylpyridine with chloromethyl alkyl ethers , while 1 - ethyloxymethyl - 3 - alkylthiomethylimidazolium chlorides were obtained in reactions of 1 - ethyloxymethylimidazol with chloromethyl alkyl sulfides .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities:  
Answer:
 None