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In this study , we utilized an accurate method , quantitative NMR ( qNMR ) , for determining the contents of stevioside and rebaudioside A in standards , with traceability to the International System of Units ( SI units ) .
 Chemical: stevioside; Chemical: rebaudioside A
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: stevioside; Chemical: rebaudioside A