Table 4.

¹³C NMR^a data for cyclic oligosaccharides 7a – 12b (D₂O, 125.75 or 150.90 MHz, 303–310 K^b).⁹

	R = H								R = Ac
Residue
	#	C-1	C-2	C-3	C-4	C-5	C-6	#	C-1	C-2	C-3	C-4	C-5	C-6
→6)-D-GlcNHR-β-(1→	7a	100.1	60.1	71.8	67.6	79.4	70.0	7b	103.3	59.9	74.3	67.9	78.1	71.3
→6)-D-GlcNHR-β-(1→	8a	99.6	57.3	73.6	70.7	75.7	68.8	8b	101.4	57.0	75.2	70.6	75.8	69.7
→6)-D-GlcNHR-β-(1→	9a	100.5	56.9	73.4	70.1	76.0	69.7	9B	102.3	56.7	75.0	70.5	75.9	69.5
→6)-D-GlcNHR-β-(1→	10a	100.9	56.9	73.4	70.6	76.2	69.8	10b	102.8	56.8	74.8	71.0	76.2	69.9
→6)-D-GlcNHR-β-(1→	11a	100.8	56.8	73.5	70.8	75.7	69.5	11b	102.6	56.9	74.7	71.3	75.7	70.2
→6)-D-GlcNHR-β-(1→	12a	100.8	56.8	73.2	70.8	75.9	69.5	12b	102.7	56.8	74.9	71.3	75.9	69.8

^aSignal of the Ac^- δ24.0–24.6 and 181.8–182.7 for 7a–12a; signal of the Ac δ 23.3–23.6 and 175.6–175.9 for 7b-12b.

^bThe NMR spectra were acquired at the temperature of 303–310 K. For each compound the temperature was chosen so that to exclude the overlap of the solvent signal (HOD) with signals of the anomeric protons in ¹H NMR spectrum.