9894
In comparison , when isolated from ethanol - treated ( two doses of 2 g / kg , 2 h apart ) 7 - day - old mouse pups , brain mitochondria displayed a transient decrease in oxygen consumption but no change in PTP regulation or H ( 2 ) O ( 2 ) production .
 Chemical: ethanol; 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: ethanol; Chemical: oxygen; Chemical: H ( 2 ) O ( 2 )