Cefoperazone acid & sodium

Cefoperazone acid:
Molecular formula: C₂₅H₃₁N₉O₆S₂
Exact Mass: 617.18
Molecular weight: 617.7
C, 48.61; H, 5.06; N, 21.41; O, 15.54; S, 10.38
Chemical structure:

Cefoperazone sodium (Lyophilization, sterile):

Molecular formula: C₂₅H₃₀N₉NaO₆S₂
Exact Mass: 639.17
Molecular weight: 639.68
C, 46.94; H, 4.73; N, 19.71; Na, 3.59; O, 15.01; S, 10.03
Chemical structure: