2697
Midline B3 serotonin nerves in rat medulla are involved in hypotensive effect of methyldopa .
 Chemical: serotonin; Disease: hypotensive; Chemical: methyldopa
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: serotonin; Disease: hypotensive; Chemical: methyldopa