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These results indicate that the adduct will likely adopt a syn conformation in an isolated nucleoside and nucleotide , while a mixture of syn and anti conformations will be observed in DNA duplexes .
 Chemical: nucleoside; Chemical: nucleotide
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: nucleoside; Chemical: nucleotide