Patent ID: 7223744

Claim:
P 1 -(2′-deoxycytidine 5′-)P 4 -(uridine 5′-)tetraphosphate, tetra-(alkali metal) salt, wherein the tetra-(alkali metal) cations of said salt are selected from the group consisting of: tetrasodium, tetralithium, tetrapotassium, monosodium/tripotassium, disodium/dipotassium, trisodium/monopotassium, monopotassium/trilithium, dipotassium/dilithium, tripotassium/monolithium, monosodium/trilithium, disodium/dilithium, trisodium/monolithium, monosodium/monolithium/dipotassium, monosodium/dilithium/monopotassium and disodium/monolithium/monopotassium.