1450
We have previously described a novel mGlu 5 positive allosteric modulator ( PAM ) , LSN2463359 and provided evidence of its ability to attenuate aspects of the behavioural response to administration of the competitive NMDA receptor antagonist , SDZ 220 , 581 .
 Chemical: LSN2463359; Chemical: NMDA; Chemical: SDZ 220 , 581
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: LSN2463359; Chemical: NMDA; Chemical: SDZ 220 , 581