15383
There is now a large body of published data showing that genotype for certain common polymorphisms in the genes encoding the target vitamin K epoxide reductase ( G - 1639A / C1173T ) and the main metabolizing enzyme CYP2C9 ( CYP2C9 * 2 and * 3 alleles ) are important determinants of the individual coumarin anticoagulant dose requirement .
 Chemical: vitamin K epoxide; Chemical: coumarin
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: vitamin K epoxide; Chemical: coumarin