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A new acylated flavonoid , 3 - O - rhamnocitrin - 6 - O - benzoyl - beta - D - glucopyranoside ( 1 ) , together with five known flavonoids , rhamnocitrin ( 2 ) , pratensein ( 3 ) , ( 3R ) - 7 , 3 ' - dihydroxy - 2 ' , 4 ' - dimethoxyisoflavan ( 4 ) , ( 3R ) - 7 , 2 ' - dihydroxy - 3 ' , 4 ' - dimethoxyisoflavan ( 5 ) and isoliquiritigenin ( 6 ) , was isolated from Oxytropis ochrocephala Bunge .
 Chemical: acylated flavonoid; Chemical: 3 - O - rhamnocitrin - 6 - O - benzoyl - beta - D - glucopyranoside; Chemical: flavonoids; Chemical: rhamnocitrin; Chemical: pratensein; Chemical: ( 3R ) - 7 , 3 ' - dihydroxy - 2 ' , 4 ' - dimethoxyisoflavan; Chemical: ( 3R ) - 7 , 2 ' - dihydroxy - 3 ' , 4 ' - dimethoxyisoflavan; Chemical: isoliquiritigenin
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: acylated flavonoid; Chemical: 3 - O - rhamnocitrin - 6 - O - benzoyl - beta - D - glucopyranoside; Chemical: flavonoids; Chemical: rhamnocitrin; Chemical: pratensein; Chemical: ( 3R ) - 7 , 3 ' - dihydroxy - 2 ' , 4 ' - dimethoxyisoflavan; Chemical: ( 3R ) - 7 , 2 ' - dihydroxy - 3 ' , 4 ' - dimethoxyisoflavan; Chemical: isoliquiritigenin