2,4,8,10-Tetraoxa-3,9-dithiaspiro(5.5)undecane 3,9-dioxide 2,6,8,10-Tetraoxa-3,9-dithiaspiro(5.5)undecane, 3,9-dioxide 3670-93-7 4-01-00-02815 (Beilstein Handbook Reference) BRN 1795184 EINECS 222-933-4 NSC 25619 Neopentanetetrayl sulfite Pentaerythritol disulfite Pentaerythritol, cyclic disulfite Sulfurous acid, cyclic diester with pentaerythritol