6961
To explore the hitherto successful derivatization of the alpha - carbon of fosmidomycin , a series of new alpha - substituted analogues was prepared .
 Chemical: alpha - carbon; Chemical: fosmidomycin
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: alpha - carbon; Chemical: fosmidomycin