868
In vitro studies using organic inhibitors specific for individual P450 isoenzymes and antibody inhibition experiments have further demonstrated that the increase in the activity of PROD , EROD and NDMA - d are due to the increase in the levels of P450 2B1 / 2B2 , 1A1 / 1A2 and 2E1 isoenzymes , respectively .
 Chemical: NDMA
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: NDMA