2,2-Bis(bromomethyl)-1,3-dibromopropane 3229-00-3 NSC8998 Pentaerythritol tetrabromide Pentaerythrityl bromide Pentaerythrityl tetrabromide Propane, 1,3-dibromo-2,2-bis(bromomethyl)- Tetra(bromomethyl)methane Tetrabromoneopentane Tetrakis(bromomethyl)methane