P-{[(2R,3S,4R,5R)-5-(6-aminopurin-9-yl)-4-hydroxy-2-[({[({[(12R)-12-hydroxy-13,13-dimethyl-2,7,11-trioxo-6,10-diaza-3-thiatetradec-14-yl]oxy}oxido(oxo)-λ5-phosphanyl)oxy]oxido(oxo)-λ5-phosphanyl}oxy)methyl]tetrahydro-3-furyl]oxy}-P-hydroxyphosphinate sodium (1:3)