22464
The DOTA linkage was installed at a mechanism - based strategic location in the pantoprazole molecule to minimize a possible negative effect of the structural modification on the drug .
 DOTA, pantoprazole
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 DOTA, pantoprazole