24239
Memory impairment was induced by scopolamine , a muscarinic receptor antagonist , or MK - 801 , an N - methyl - D - aspartate receptor antagonist .
 Chemical: scopolamine; Chemical: MK - 801; Chemical: N - methyl - D - aspartate
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: scopolamine; Chemical: MK - 801; Chemical: N - methyl - D - aspartate