18389
The concentrations of renal malondialdehyde , reactive oxygen species , 8 - hydroxydeoxyguanosine , serum creatinine , blood urea nitrogen , and renal arsenic accumulation were significantly decreased and reduced renal morphologic injury was observed compared with the As2O3 - treated group .
 Chemical: malondialdehyde; Chemical: oxygen; Chemical: 8 - hydroxydeoxyguanosine; Chemical: creatinine; Chemical: urea; Chemical: nitrogen; Chemical: arsenic; Chemical: As2O3
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: malondialdehyde; Chemical: oxygen; Chemical: 8 - hydroxydeoxyguanosine; Chemical: creatinine; Chemical: urea; Chemical: nitrogen; Chemical: arsenic; Chemical: As2O3