2033
Computational molecular modeling of RS41A and RS194B interactions with VX inhibited hAChE , bound reversibly in Michaelis type complex and covalently in the pentacoordinate reaction intermediate suggests that the faster reactivation reaction is a consequence of a tighter RS194B interactions with hAChE peripheral site ( PAS ) residues , in particular with D74 , resulting in lower interaction energies for formation of both the binding and reactivation states .
 RS41A, RS194B, RS194B
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 RS41A, RS194B, RS194B