When D-glucuronolactone (I) was reacted with ammonia, depending on the reaction condition, various products such as 1-amino-1-deoxy-D-glucuronamide (II), 1-(glucuronylamino)-1-deoxy-D-glucuronic acid (IV), D-glucuronamide (III) and NH4-D-glucuronate (VI) have been afforded and every structure of the products was determined to be in a pyranose structure.
