1.14.15.18	1,25-Dihydroxycholecalciferol	calcitriol	8986	
1.14.15.18	1,25-Dihydroxycholecalciferol	calcitriol; in vivo only inhibitory in vitamin D receptor containing cells, therefore: negative feedback inhibition is mediated by the enzyme through liganded vitamin D receptor	8986	
1.14.15.18	1,25-Dihydroxycholecalciferol	calcitriol; decreases mRNA expression in less differentiated cells like Caco-2/AQ and COGA-1A and -1E	8986	
1.14.15.18	22-oxacalcitriol	vitamin D3 analogue, inhibits in vitro and in vivo	108194	
1.14.15.18	25-hydroxy-3-deoxy-2-oxavitamin D3	vitamin D3 analogue, competitive inhibition	108199	
1.14.15.18	25-hydroxydihydrotachysterol3	-	108200	
1.14.15.18	25-hydroxyvitamin D2	CYP27B1 shows inhibition when substrate concentrations in the membrane are greater than 4 times Km, more pronounced with 25-hydroxyvitamin D3 than with 25-hydroxyvitamin D2	12134	
1.14.15.18	25-hydroxyvitamin D3	CYP27B1 shows inhibition when substrate concentrations in the membrane are greater than 4 times Km, more pronounced with 25-hydroxyvitamin D3 than with 25-hydroxyvitamin D2	4387	
1.14.15.18	3-deoxy-2-oxa-9(11)-didehydro-25-hydroxyvitamin D3	vitamin D3 analogue, competitive inhibition	108297	
1.14.15.18	A-homo-3-deoxy-2-oxa-25-hydroxyvitamin D3	vitamin D3 analogue, competitive inhibition	108640