20621
Green luminescent , monodisperse , smooth , porous and hollow spheres were simply prepared by Cu ( 2 + ) and temperature mediated oxidative coupling assembly of green tea polyphenols in water .
 Chemical: Cu ( 2 + ); Chemical: polyphenols
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: Cu ( 2 + ); Chemical: polyphenols