12573
Final comparative molecular field analysis ( CoMFA ) and comparative molecular similarity indices analysis ( CoMSIA ) models were chosen based on the rational selection method , Gasteiger - H u ckel charges and a grid spacing of 0 . 5 A .
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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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