10513
Photophysical and electrochemical investigations of the fluorescent probe , 4 , 4 ' - bis ( 2 - benzoxazolyl ) stilbene .
 Chemical: 4 , 4 ' - bis ( 2 - benzoxazolyl ) stilbene
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 , 4 ' - bis ( 2 - benzoxazolyl ) stilbene