1,6-Anhydro-beta-D-glucopyranose 1,6-Anhydro-beta-D-glucose 1,6-Anhydro-beta-glucopyranose 498-07-7 AI3-61731 CCRIS 4273 EINECS 207-855-0 Leucoglucosan Levoglucosan (8CI) NSC 46243 beta-D-Glucopyranose, 1,6-anhydro-