PHOTOBROMINATION OF CARBOHYDRATE DERIVATIVES. PART 8. REACTION OF FURANOSE DERIVATIVES WITH N-BROMOSUCCINIMIDE. X-RAY MOLECULAR STRUCTURE OF 1-O-ACETYL-2,5,6-TRI-O-BENZOYL-4-HYDROXY-3,4-O-(α-SUCCINIMIDOBENZYLIDENE)# -β-D-GALACTOFURANO