13462
The receptor dissolved in water with neutral pH shows almost no fluorescence due to the photoinduced electron transfer ( PET ) from the amide and amine nitrogens to the excited state coumarin moiety .
 Chemical: amide and amine nitrogens; Chemical: coumarin
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: amide and amine nitrogens, coumarin 
Answer:
 Chemical: amide and amine nitrogens; Chemical: coumarin