9696
In this Letter we report on the advances in our NPBWR1 antagonist program aimed at optimizing the 5 - chloro - 2 - ( 3 , 5 - dimethylphenyl ) - 4 - ( 4 - methoxyphenoxy ) pyridazin - 3 ( 2H ) - one lead molecule previously obtained from a high - throughput screening ( HTS ) - derived hit .
 Chemical: 5 - chloro - 2 - ( 3 , 5 - dimethylphenyl ) - 4 - ( 4 - methoxyphenoxy ) pyridazin - 3 ( 2H ) - one
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: 5 - chloro - 2 - ( 3 , 5 - dimethylphenyl ) - 4 - ( 4 - methoxyphenoxy ) pyridazin - 3 ( 2H ) - one