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A new and efficient synthesis of a naturally occurring amide alkaloid , N - isobutyl - 4 , 5 - epoxy - 2 ( E ) - decenamide isolated from the roots of Piper nigrum has been described involving a total of nine steps .
 Chemical: amide; Chemical: N - isobutyl - 4 , 5 - epoxy - 2 ( E ) - decenamide
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, N - isobutyl - 4 , 5 - epoxy - 2 ( E ) - decenamide 
Answer:
 Chemical: amide; Chemical: N - isobutyl - 4 , 5 - epoxy - 2 ( E ) - decenamide