19015
In the final step of the synthetic route , an uncommon monoacylation of beta - aminoamidine 8 at the less reactive beta - phenylamino - group took place .
 Chemical: beta - aminoamidine; Chemical: beta - phenylamino
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: beta - aminoamidine; Chemical: beta - phenylamino