13404
There are many human extra - renal tissues and cells that biosynthesize 1 alpha , 25 - dihydroxyvitamin D ( 1 alpha , 25 ( OH ) ( 2 ) D ) by the action of CYP27B1 / 1 alpha - hydroxylase .
 Chemical: 1 alpha , 25 - dihydroxyvitamin D; Chemical: 1 alpha , 25 ( OH ) ( 2 ) 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 alpha , 25 - dihydroxyvitamin D; Chemical: 1 alpha , 25 ( OH ) ( 2 ) D