19915
The extracted DNA was hydrolyzed and 2 ' - deoxycytidine and 5 - methyl - 2 ' - deoxycytidine were determined by HPLC - UV .
 Chemical: 2 ' - deoxycytidine; Chemical: 5 - methyl - 2 ' - deoxycytidine
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: 2 ' - deoxycytidine, 5 - methyl - 2 ' - deoxycytidine 
Answer:
 Chemical: 2 ' - deoxycytidine; Chemical: 5 - methyl - 2 ' - deoxycytidine