12739
1 - [ ( 4 - Chlorophenyl ) ( phenyl ) methylene ] - 4 - ( 6 - nitrobenzothiazol - 2 - yl ) semicarbazide emerged as the lead MAO - B inhibitor , with top ranking in both the experimental MAO - B assay ( IC ( 50 ) : 0 . 004 +/- 0 . 001 mu M ) and in computational docking studies ( K ( i ) : 1 . 08 mu M ) .
 Chemical: 1 - [ ( 4 - Chlorophenyl ) ( phenyl ) methylene ] - 4 - ( 6 - nitrobenzothiazol - 2 - yl ) semicarbazide
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: 1 - [ ( 4 - Chlorophenyl ) ( phenyl ) methylene ] - 4 - ( 6 - nitrobenzothiazol - 2 - yl ) semicarbazide