19606
The chemical structures of these compounds were elucidated using 1 dimensional ( 1D ) / 2D NMR and high resolution FAB - MS , and the absolute configuration was confirmed by circular dichroism ( CD ) .
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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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