(+-)-2-(2,5,5-Triphenyl-m-dioxan-2-yl)piperidine (+-)-2-alpha-Piperidyl-2,5,5-triphenyl-1,3-dioxane 21491-20-3 BRN 1045590 Piperidine, 2-(2,5,5-triphenyl-m-dioxan-2-yl)-, (+-)-