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One of the compounds , N - ( 6 - phenylheptyl ) demethylvancomycin ( 12 a ) , was found to exhibit more potent antibacterial activity than vancomycin and demethylvancomycin .
 Chemical: N - ( 6 - phenylheptyl ) demethylvancomycin; Chemical: vancomycin; Chemical: demethylvancomycin
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: N - ( 6 - phenylheptyl ) demethylvancomycin, vancomycin, demethylvancomycin 
Answer:
 Chemical: N - ( 6 - phenylheptyl ) demethylvancomycin; Chemical: vancomycin; Chemical: demethylvancomycin