28650
The poly ( benzyl 1 , 2 - glycerol carbonate ) s were obtained via the ring - opening copolymerization of rac - / ( R ) - benzyl glycidyl ether with CO2 using [ SalcyCo ( III ) X ] complexes with high carbonate linkage selectivity and polymer / cyclic carbonate selectivity ( > 99 % ) .
 Chemical: poly ( benzyl 1 , 2 - glycerol carbonate ) s; Chemical: rac - / ( R ) - benzyl glycidyl ether; Chemical: CO2; Chemical: [ SalcyCo ( III ) X ]; Chemical: carbonate; Chemical: carbonate
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: poly ( benzyl 1 , 2 - glycerol carbonate ) s; Chemical: rac - / ( R ) - benzyl glycidyl ether; Chemical: CO2; Chemical: [ SalcyCo ( III ) X ]; Chemical: carbonate; Chemical: carbonate