Noun
English Wikipedia has an article on:levoglucosanWikipedia
levoglucosan (usually uncountable, plural levoglucosans)
(organic chemistry) A bridged, polyhydroxy heterocycle, 6,8-dioxabicyclo[3.2.1]octane-2,3,4-triol or 1,6-anhydro-beta-D-glucose, formed by controlled pyrolysis of various carbohydrates