14940
Neuroprotective effects of mercaptoethylleonurine and mercaptoethylguanidine analogs on hydrogen peroxide - induced apoptosis in human neuronal SH - SY5Y cells .
 Chemical: mercaptoethylleonurine; Chemical: mercaptoethylguanidine; Chemical: hydrogen peroxide
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: mercaptoethylleonurine; Chemical: mercaptoethylguanidine; Chemical: hydrogen peroxide