8272
Caught in the act : The FRET - Capture approach exploits a bound solvatochromic fluorophore , 4 - N , N - dimethylamino - 1 , 8 - naphthalimide , as a FRET donor in both inter - and intramolecular energy transfer .
 Chemical: 4 - N , N - dimethylamino - 1 , 8 - naphthalimide
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: 4 - N , N - dimethylamino - 1 , 8 - naphthalimide