Color Reaction Product of Urea with Diacetyl Monoxime and Glucuronolactone. II. On the Reaction of Butylurea with Diacetyl, 1-Phenyl-1, 2-propanedione, 1-Phenyl-1-hydroxyimino-2-propanone, and 1-Phenyl-2-hydroxyimino-1-propanone