N-(2,2-diethoxycarbonylvinyl)-β-D-mannopyranosylamine

1,6-anhydro-N-(2,2-diethoxycarbonylvinyl)-β-D-mannopyranosylamine

N-benzyl-3,4-di-O-benzyl-1,5-dideoxy-1,5-imino-2,6-di-O-methanesulfonyl-L-gulitol