2029
Compared to reference pyridinium reactivators , 2PAM and MMB4 , molecular recognition of RS41A reflected in its Kox constant was compromised by an order of magnitude on average for different OP - hAChE conjugates , without significant differences in the first order maximal phosphorylation rate constant k2 .
 Chemical: pyridinium; Chemical: 2PAM; Chemical: MMB4; Chemical: RS41A
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: pyridinium, 2PAM, MMB4, RS41A 
Answer:
 Chemical: pyridinium; Chemical: 2PAM; Chemical: MMB4; Chemical: RS41A