20489
TTBC - Cl is found to form J - aggregates with a classical Davydov - split absorption band ( type I spectrum ) even under different preparation conditions .
 Chemical: TTBC - Cl
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: TTBC - Cl