7986
Anion - pi interactions have been systematically studied using tetraoxacalix [ 2 ] arene [ 2 ] triazine 1 , an electron - deficient and cavity self - tunable macrocyclic host , as an electron - neutral molecular probe .
 Chemical: tetraoxacalix [ 2 ] arene [ 2 ] triazine
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: tetraoxacalix [ 2 ] arene [ 2 ] triazine