tokens: The active metabolite of vitamin D , 1 , 25 dihydroxyvitamin D3 , is an important immunoregulatory hormone [ 1 ] .
folded_tokens: the active metabolite of vitamin d , 1 , 25 dihydroxyvitamin d3 , is an important immunoregulatory hormone [ 1 ] .
labels: O O O O B-lipid I-lipid I-lipid I-lipid I-lipid I-lipid I-lipid I-lipid I-lipid O O O B-other_organic_compound I-other_organic_compound O O O O