29727
In vivo FT - Raman spectroscopy reveals the presence of H2O2 , methionine sulfoxide , and tryptophan metabolites ; i . e . , N - formylkynurenine and kynurenine , implying Fenton chemistry in the cascade ( n = 10 ) .
 Chemical: H2O2; Chemical: methionine sulfoxide; Chemical: tryptophan; Chemical: N - formylkynurenine; Chemical: kynurenine
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: H2O2, methionine sulfoxide, tryptophan, N - formylkynurenine, kynurenine 
Answer:
 Chemical: H2O2; Chemical: methionine sulfoxide; Chemical: tryptophan; Chemical: N - formylkynurenine; Chemical: kynurenine