21747
Optimisation of synthesis of oligosaccharides derived from lactulose ( fructosyl - galacto - oligosaccharides ) with beta - galactosidases of different origin .
 Chemical: lactulose; Chemical: fructosyl - galacto - oligosaccharides
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: lactulose; Chemical: fructosyl - galacto - oligosaccharides