17199
Neuroprotective effects of oral gallic acid against oxidative stress induced by 6 - hydroxydopamine in rats .
 Chemical: gallic acid; Chemical: 6 - hydroxydopamine
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: gallic acid, 6 - hydroxydopamine 
Answer:
 Chemical: gallic acid; Chemical: 6 - hydroxydopamine