3346
This observation is suggested to be an in vivo demonstration of the conclusion derived from in vitro experiments that MK - 801 binding requires agonist - induced opening of the channel sites of the NMDA receptor .
 Chemical: MK - 801; Chemical: NMDA
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: MK - 801; Chemical: NMDA