7949
A series of novel 11 , 4 '' - disubstituted azithromycin analogs were synthesized and evaluated for their antibacterial activity .
 Chemical: 11 , 4 '' - disubstituted azithromycin
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: 11 , 4 '' - disubstituted azithromycin 
Answer:
 Chemical: 11 , 4 '' - disubstituted azithromycin