4671
Gene polymorphisms of the 4 - ( methylnitrosamino ) - 1 - ( 3 - pyridyl ) - 1 - butanone ( NNK ) metabolism - related enzymes - cytochrome P450 ( CYP ) monooxygenase 2A13 ( CYP2A13 ) and UDP - glucuronosyltransferases ( UGT ) - 2B7 could contribute to the levels of NNK - related metabolites in urine , thereby increasing the susceptibility to urothelial carcinoma ( UC ) .
 Chemical: 4 - ( methylnitrosamino ) - 1 - ( 3 - pyridyl ) - 1 - butanone; Chemical: NNK; Chemical: UDP; Chemical: NNK
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: 4 - ( methylnitrosamino ) - 1 - ( 3 - pyridyl ) - 1 - butanone; Chemical: NNK; Chemical: UDP; Chemical: NNK