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NMR solution structure study of the representative component hydroxysafflor yellow A and other quinochalcone C - glycosides from Carthamus tinctorius .
 hydroxysafflor yellow A, quinochalcone C - glycosides
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 hydroxysafflor yellow A, quinochalcone C - glycosides