3,4-Diacetyl-1,2-5,6-dianhydro-dulcitol 3,4-Diacetyldianhydrogalactitol 57230-48-5 BRN 5038885 Dianhydro-3,4-diacetylgalactitol Galactitol, 1,2:5,6-dianhydro-, diacetate