21348
To investigate the mechanism of action , a photoactive analogue , 1 - azidoanthracene , was synthesized .
 Chemical: 1 - azidoanthracene
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 - azidoanthracene