12570
Compounds having sulfonyl moiety with bis ( trimethylsilyl ) - 1 , 3 , 4 - oxadiazoles ( 5a - c ) , exhibited better anti - allergic activities than those of compounds having sulphur moiety with bis ( trimethylsilyl ) - 1 , 3 , 4 - oxadiazoles ( 4a - c ) .
 Chemical: sulfonyl; Chemical: bis ( trimethylsilyl ) - 1 , 3 , 4 - oxadiazoles; Chemical: sulphur; Chemical: bis ( trimethylsilyl ) - 1 , 3 , 4 - oxadiazoles
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: sulfonyl; Chemical: bis ( trimethylsilyl ) - 1 , 3 , 4 - oxadiazoles; Chemical: sulphur; Chemical: bis ( trimethylsilyl ) - 1 , 3 , 4 - oxadiazoles