25-hydroxyvitamin D3 3'-(N-(4-azido-2-nitrophenyl)amino)propyl ether, (3beta)-isomer, 3,5-3H-phenyl-labeled
25-hydroxyvitamin d3 3'-(n-(4-azido-2-nitrophenyl)amino)propyl ether, (3beta)-isomer, 3,5-3h-phenyl-labeled