7690
Ischemic and hemorrhagic strokes have different etiologies , but share some pathogenic mechanisms , including a pro - neurotoxic effect of endogenous tissue plasminogen activator ( tPA ) via N - methyl - d - Aspartate ( NMDA ) receptors .
 N - methyl - d - Aspartate, NMDA
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 N - methyl - d - Aspartate, NMDA