Chemical formula: C₆₈¹³C₆H₁₂₄N₄O₅₅

Physical state of bulk product: White fluffy solid

Molar mass: 1955.7331

Exact mass (M+Na; m/1): 1977.7123

Observed high-resolution mass (Bruker SolariX MALDI): 1977.7139 (0.81 ppm error)

¹³C₆ Isotopic abundance: 94%

Glycoform purity determined by reductive amination with procainamide followed by LC-ESI (positive mode) analysis: >95%.  Reductive amination resulted in hydrolysis of a single galactose; a signal is not seen in high-resolution mass of the parent compound.