Table 1.

Δδ^SR data for the (S)- and (R)-MTPA esters of 2′-methyl-UNA

				ΔδSR= (δS− δR)
Proton	d (S)-Mosher ester	d (R)-Mosher ester	ppm	Hz (400 MHz)
compound 17S
3NH	11.48	11.44	0.04	16
1′H	5.88	5.82	0.02	8
2′Me	1.20	1.31	−0.11	−44
compound 17R
3NH	11.28	11.47	−0.19	−76
1′H	5.89	5.98	−0.09	−36
2′Me	1.39	1.30	0.09	36