8368
The intensities of IR features of 1 - C ( 10 ) H ( 9 ) ( + ) decreased after the matrix was maintained in darkness for 19 h , whereas those of 1 - C ( 10 ) H ( 9 ) and 2 - C ( 10 ) H ( 9 ) increased .
 Chemical: 1 - C ( 10 ) H ( 9 ) ( + ); Chemical: 1 - C ( 10 ) H ( 9 ); Chemical: 2 - C ( 10 ) H ( 9 )
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: 1 - C ( 10 ) H ( 9 ) ( + ); Chemical: 1 - C ( 10 ) H ( 9 ); Chemical: 2 - C ( 10 ) H ( 9 )