1489
In the kidney , synthesis of 1 , 25 ( OH ) ( 2 ) D is suppressed by fibroblast growth factor 23 ( FGF23 ) , via transcriptional suppression of the vitamin D - activating enzyme 1 alpha - hydroxylase ( CYP27B1 ) .
 Chemical: 1 , 25 ( OH ) ( 2 ) D; Chemical: vitamin D
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: 1 , 25 ( OH ) ( 2 ) D; Chemical: vitamin D