NEUROTROPHIN-4, HUMAN; HUMAN NEUROTROPHIC 4/5; HUMAN NEUROTROPHIC 5; HUMAN NEUROTROPHIC FACTOR-4; HUMAN NEUROTROPHIN 4; HUMAN NT-4; HUMAN NT-4/NT-5; HUMAN NT-5; RECOMBINANT HUMAN NT-4; [(2r,3r,4r,5r)-5-(6-Amino-9h-Purin-9-Yl)-3-Hydroxy-4-(Phosphonooxy)tetrahydrofuran-2-Yl]methyl [(2r,3s,4s)-3,4-Dihydroxytetrahydrofuran-2-Yl]methyl Dihydrogen Diphosphate