16540
Astrocytes co - treated with [ 6 ] - shogaol and H ( 2 ) O ( 2 ) for 1 h showed decrease in reactive oxygen species production compared with those only treated with H ( 2 ) O ( 2 ) .
 Chemical: [ 6 ] - shogaol; Chemical: H ( 2 ) O ( 2 ); Chemical: oxygen; Chemical: H ( 2 ) O ( 2 )
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: [ 6 ] - shogaol; Chemical: H ( 2 ) O ( 2 ); Chemical: oxygen; Chemical: H ( 2 ) O ( 2 )