21963
Statistical and satisfactory results were obtained for the best HQSAR ( r ( 2 ) of 0 . 968 and qLOO ( 2 ) of 0 . 751 ) , CoMFA ( r ( 2 ) of 0 . 955 and qLOO ( 2 ) of 0 . 806 ) and CoMSIA ( r ( 2 ) of 0 . 965 and qLOO ( 2 ) of 0 . 659 ) models .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
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