1,5,2,4-Dioxadithiepane, 3, 3-dimethyl-, 2,2,4,4-tetraoxide 3,3-Dimethyl-1,5,2,4-dioxadithiepane 2,2,4,4-tetraoxide AIDS-130594 AIDS130594 Ethylene 2,2-propanedisulfonate NSC606196