11853
The model suggests an open substrate binding site that is capable of binding the natural substrate , monocillin II , and possibly other molecules such as 4 - hydroxyisoquinoline ( 1 ) and 6 - hydroxyisoquinoline ( 2 ) .
 monocillin II, 4 - hydroxyisoquinoline, 6 - hydroxyisoquinoline
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 monocillin II, 4 - hydroxyisoquinoline, 6 - hydroxyisoquinoline