1,3,2-Dioxathiane, 5-methyl-5-propyl-, 2-oxide 1,3-Propanediol, 2-methyl-2-propyl-, cyclic sulfite (ester) 1125-06-0 2-Methyl-2-propyl-1,3-propanediol cyclic sulfite (ester) BRN 1865455 NSC 25617