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The resolution of seven enantiomeric pairs of chiral derivatives of xanthones ( CDXs ) on ( S , S ) - Whelk - O1 and L - phenylglycine chiral stationary phases ( CSPs ) was systematically investigated using multimodal elution conditions ( normal - phase , polar - organic , and reversed - phase ) .
 Chemical: xanthones; Chemical: L - phenylglycine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
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Answer:
 Chemical: xanthones; Chemical: L - phenylglycine