22373
The structure of one of the colourless compounds was established as 2 - ( 2 - ( 1 - ( 1 - carboxy - 2 - methylpropyl ) - 3 , 4 - dimethyl - 1H - pyrrol - 2 - yl ) methyl - 3 , 4 - dimethyl - 1H - pyrrol - 1 - yl ) - 3 - methylbutanoic acid .
 Chemical: 2 - ( 2 - ( 1 - ( 1 - carboxy - 2 - methylpropyl ) - 3 , 4 - dimethyl - 1H - pyrrol - 2 - yl ) methyl - 3 , 4 - dimethyl - 1H - pyrrol - 1 - yl ) - 3 - methylbutanoic acid
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: 2 - ( 2 - ( 1 - ( 1 - carboxy - 2 - methylpropyl ) - 3 , 4 - dimethyl - 1H - pyrrol - 2 - yl ) methyl - 3 , 4 - dimethyl - 1H - pyrrol - 1 - yl ) - 3 - methylbutanoic acid