21286
Their structures were established by their spectroscopic data and by comparing with those of azalomycins F3a , F4a and F5a .
 Chemical: azalomycins F3a , F4a and F5a
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: azalomycins F3a , F4a and F5a