17221
Simultaneous determination of aflatoxin B ( 1 ) and ochratoxin A in licorice roots and fritillary bulbs by solid - phase extraction coupled with high - performance liquid chromatography - tandem mass spectrometry .
 aflatoxin B ( 1 ), ochratoxin A
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 aflatoxin B ( 1 ), ochratoxin A