11816
5 - Hydroxytryptamine type 7 receptor neuroprotection against NMDA - induced excitotoxicity is PDGF beta receptor dependent .
 Chemical: 5 - Hydroxytryptamine; Chemical: NMDA
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: 5 - Hydroxytryptamine; Chemical: NMDA