9160
OlfGST pi and rho exhibited thiol oxidoreductase activity toward 2 - hydroxyethyl disulfide ( 2 - HEDS ) and conjugated 4 - hydroxynonenal ( HNE ) , a toxic aldehyde with neurodegenerative properties .
 Chemical: thiol; Chemical: 2 - hydroxyethyl disulfide; Chemical: 2 - HEDS; Chemical: 4 - hydroxynonenal; Chemical: HNE; Chemical: aldehyde
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: thiol, 2 - hydroxyethyl disulfide, 2 - HEDS, 4 - hydroxynonenal, HNE, aldehyde 
Answer:
 Chemical: thiol; Chemical: 2 - hydroxyethyl disulfide; Chemical: 2 - HEDS; Chemical: 4 - hydroxynonenal; Chemical: HNE; Chemical: aldehyde