title: Effect of wavelength on the formation of 1 alpha-hydroxyprevitamin D3 in the ultraviolet irradiation of cholesta-5,7-diene-1 alpha, 3 beta-diol and use of a filter solution in the photochemical reaction in the synthesis of 1 alpha-hydroxyvitamin D3.
mesh_terms: D002775:Cholestadienols / Q000528:radiation effects*; D005374:Filtration; D006887:Hydroxycholecalciferols / Q000138:chemical synthesis*; D010777:Photochemistry; D014466:Ultraviolet Rays
chemical_list: D002775:Cholestadienols; D006887:Hydroxycholecalciferols; C030850:1-hydroxyprevitamin D3; C030849:cholesta-5,7-diene-1 alpha,3 beta-diol; C008088:alfacalcidol