12550
The phages were dried in the presence of lactose , trehalose or dextran 35 , serving as an excipient to give the resulting powder the necessary bulk mass and offer protection to the delicate phage structure .
 Chemical: lactose; Chemical: trehalose
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: lactose; Chemical: trehalose