13089
Separation was by a reversed - phase Chiralcel OD - RH column , under isocratic conditions using a mixture of acetonitrile - 2 mM ammonium acetate in water ( 60 / 40 , v / v ) as the mobile phase at a flow rate of 0 . 4 mL / min .
 Chemical: acetonitrile; Chemical: ammonium acetate
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: acetonitrile; Chemical: ammonium acetate