23963
Moreover , 3 - substituted 6dTalp was 2 - O - acetylated and additional O - acetyl groups were identified at O - 2 and O - 4 ( or O - 3 ) positions of the terminal 6dTalp .
 Chemical: 6dTalp; Chemical: O - acetyl; Chemical: 6dTalp
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: 6dTalp; Chemical: O - acetyl; Chemical: 6dTalp