Calcium bis[2-[[[4-[[[[(hydroxymethyl)amino]carbonyl]amino]sulfonyl]phenyl]amino]carbonyl]benzoate];calcium bis[2-[[[4-[[[[(hydroxymethyl)amino]carbonyl]amino]sulphonyl]phenyl]amino]carbonyl]benzoate];Bis[2-[[[4-[[[[(hydroxymethyl)amino]carbonyl]amino]sulfonyl]phenyl]amino]carbonyl]benzoic acid]calcium salt