6883
In addition , rifampin pretreatment resulted in an 8 - fold increase in formation of the major metabolite of 25OHD3 , 4 beta , 25 ( OH ) 2 D3 .
 Chemical: rifampin; Chemical: 25OHD3; Chemical: 4 beta , 25 ( OH ) 2 D3
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: rifampin; Chemical: 25OHD3; Chemical: 4 beta , 25 ( OH ) 2 D3