2024
The currently used therapy , focusing on the reactivation of inhibited AChE , is limited to peripheral tissues because commonly used quaternary pyridinium oxime reactivators do not cross the blood brain barrier ( BBB ) at therapeutically relevant levels .
 Chemical: quaternary pyridinium oxime
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: quaternary pyridinium oxime