68516-36-9 8-Tetrahydropyranyloxy-1-octyn-1-ylmagnesium bromide Bromo(8-((tetrahydro-2H-pyran-2-yl)oxy)-1-octynyl)magnesium EINECS 271-150-4 Magnesium, bromo(8-((tetrahydro-2H-pyran-2-yl)oxy)-1-octynyl)-