5856
Two new C - benzylated dihydrochalcone derivatives , 4 , 2 ' , 4 ' - trihydroxy - 6 ' - methoxy - 3 ' ( 2 ' ' - hydroxybenzyl ) dihydrochalcone ( 1 ) and 2 ' , 4 ' - dihydroxy - 4 , 6 ' - dimethoxy - 3 ' ( 2 ' ' - hydroxybenzyl ) dihydrochalcone ( 2 ) , along with six known flavonoid derivatives ( 3 - 8 ) , a known dihydrochalcone dimer ( 9 ) , three known aromatic esters ( 10 - 12 ) , and one known aromatic amide ( 13 ) , were isolated from the leaves of Melodorum siamensis .
 Chemical: C - benzylated dihydrochalcone; Chemical: 4 , 2 ' , 4 ' - trihydroxy - 6 ' - methoxy - 3 ' ( 2 ' ' - hydroxybenzyl ) dihydrochalcone; Chemical: 2 ' , 4 ' - dihydroxy - 4 , 6 ' - dimethoxy - 3 ' ( 2 ' ' - hydroxybenzyl ) dihydrochalcone; Chemical: flavonoid; Chemical: dihydrochalcone; Chemical: aromatic esters; Chemical: aromatic amide
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: C - benzylated dihydrochalcone; Chemical: 4 , 2 ' , 4 ' - trihydroxy - 6 ' - methoxy - 3 ' ( 2 ' ' - hydroxybenzyl ) dihydrochalcone; Chemical: 2 ' , 4 ' - dihydroxy - 4 , 6 ' - dimethoxy - 3 ' ( 2 ' ' - hydroxybenzyl ) dihydrochalcone; Chemical: flavonoid; Chemical: dihydrochalcone; Chemical: aromatic esters; Chemical: aromatic amide