16692
Insulin ( 1mg / ml ) was oxidized with 40 mu M Cu ( 2 + ) and 4mM ascorbic acid in absence or presence of excipients .
 Chemical: Cu ( 2 + ); Chemical: ascorbic acid
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: Cu ( 2 + ); Chemical: ascorbic acid