27896
In the present study , we describe the synthesis of the cAAC : ZnCl2 adduct ( 1 ) using a cyclic alkylaminocarbene ( cAAC ) as donor ligand .
 ZnCl2, cyclic alkylaminocarbene, cAAC
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 ZnCl2, cyclic alkylaminocarbene, cAAC