4592
Pentobarbital , scopolamine and MK - 801 protected the brain damage by pilocarpine , though in the MK - 801 - treated group , the pyramidal cells of hippocampus appeared darker than normal .
 Chemical: Pentobarbital; Chemical: scopolamine; Chemical: MK - 801; Disease: brain damage; Chemical: pilocarpine; Chemical: MK - 801
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: Pentobarbital; Chemical: scopolamine; Chemical: MK - 801; Disease: brain damage; Chemical: pilocarpine; Chemical: MK - 801