4-Nitrophenyl 6-O-alpha-D-mannopyranosyl-alpha-D-mannopyranoside 72647-96-2 Para-nitrophenyl 6-O-alpha-D-mannopyranosyl-alpha-D-mannopyranoside alpha-D-Mannopyranoside, 4-nitrophenyl 6-O-alpha-D-mannopyranosyl-