12939
The planar structures were established on the basis of NMR and MS analysis , and the absolute configurations of 1 - 9 were defined using the modified Mosher ' s method and CD spectroscopic data analysis .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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