Table 1.

Synthetic yields and MALDI-TOF mass data of oligonucleotides ODN1–ODN7

				MALDI-TOF mass [M–H]–
Name	Oligonucleotides (5′–3′)	Modification (T = )	Yields [%]	Calcd.	Found
ODN1	d(GCGTTTTTTGCT)	GuNA[Et]	13	3729.5	3729.6
ODN2		GuNA[iPr]	22	3743.5	3743.7
ODN3		GuNA[tBu]	2	3757.5	3758.1
ODN4		GuNA[Me,Me]	24	3729.5	3728.6
ODN5		GuNA[Me,tBu]	22	3771.6	3771.4
ODN6	d(GCGTTTTTTGCT)	GuNA[Me,Me]	5	3923.7	3923.6
ODN7		GuNA[Me,tBu]	2	4050.0	4050.7