8365
Protonated naphthalene ( C ( 10 ) H ( 9 ) ( + ) ) and its neutral counterparts ( hydronaphthyl radicals , C ( 10 ) H ( 9 ) ) are important intermediates in the reactions of aromatic compounds and in understanding the unidentified infrared ( IR ) emissions from interstellar media .
 Chemical: Protonated naphthalene; Chemical: C ( 10 ) H ( 9 ) ( + ); Chemical: hydronaphthyl; Chemical: 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: Protonated naphthalene; Chemical: C ( 10 ) H ( 9 ) ( + ); Chemical: hydronaphthyl; Chemical: C ( 10 ) H ( 9 )