Patent ID: 7759470

Claim:
A compound having the formula wherein A and B are independent from each other and are independent from R and X, and A and B are selected from the group consisting of hydrogen, a protecting group, a solid phase with a linker, a phosphoramidite, an H-phosphonate, a triphosphate, a phosphate, and a chain of nucleotide residues, with the proviso that only A may be a triphosphate, with the proviso that if one of A or B is a phosphoramidite or an H-phosphonate, the other of A and B is a protective group and R is not OH, with the proviso that only one of A and B is a solid phase with a linker, R is selected from the group consisting of H, OH, O-alkyl, O-alkenyl, O-alkinyl, O-protective group, and F, and X is selected from the group consisting of a reactive group, a protected reactive group, a linker with a reactive group a linker with a protected reactive group, a signal entity, a protected signal entity, a linker with a signal entity, and a linker with a protected signal entity.