16758
Microwave assisted nano ( ZnO - TiO2 ) catalyzed synthesis of some new 4 , 5 , 6 , 7 - tetrahydro - 6 - ( ( 5 - substituted - 1 , 3 , 4 - oxadiazol - 2 - yl ) methyl ) thieno [ 2 , 3 - c ] pyridine as antimicrobial agents .
 Chemical: ZnO; Chemical: TiO2; Chemical: 4 , 5 , 6 , 7 - tetrahydro - 6 - ( ( 5 - substituted - 1 , 3 , 4 - oxadiazol - 2 - yl ) methyl ) thieno [ 2 , 3 - c ] pyridine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
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Answer:
 Chemical: ZnO; Chemical: TiO2; Chemical: 4 , 5 , 6 , 7 - tetrahydro - 6 - ( ( 5 - substituted - 1 , 3 , 4 - oxadiazol - 2 - yl ) methyl ) thieno [ 2 , 3 - c ] pyridine