25569
X - ray structure analysis of a solid solution of milbemycins A3 and A4 .
 Chemical: milbemycins A3 and A4
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: milbemycins A3 and A4