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Phytochemical investigations resulted in the isolation of ursolic acid , oleanolic acid , apigenin , luteolin and ixoroside .
 ursolic acid, oleanolic acid, apigenin, luteolin, ixoroside
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 ursolic acid, oleanolic acid, apigenin, luteolin, ixoroside