12380
We propose that l - ddBCNAs represent significant innovative antiviral candidates versus measles and poxviruses , and we suggest a mechanism of action versus one or more cellular targets that are essential for viral replication .
 Chemical: ddBCNAs
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: ddBCNAs 
Answer:
 Chemical: ddBCNAs