17843
Three free unusual amino acids , named N - methyl - alpha - alanine , N - methyl - beta - alanine , and 2 , 7 - diaminooctan - 1 , 8 - dioic acid , described for the first time in a plant , and known trigonelline were also isolated from the stem bark of D . michelsonii .
 Chemical: amino acids; Chemical: N - methyl - alpha - alanine; Chemical: N - methyl - beta - alanine; Chemical: 2 , 7 - diaminooctan - 1 , 8 - dioic acid; Chemical: trigonelline
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: amino acids; Chemical: N - methyl - alpha - alanine; Chemical: N - methyl - beta - alanine; Chemical: 2 , 7 - diaminooctan - 1 , 8 - dioic acid; Chemical: trigonelline