Table 1.

1D and 2D NMR data for target impurity (500/125 MHz, D₂O)

C/H	δH	δC	DEPT	HMBC
1	/	174.7	C	H-2, H-3
2	3.60, t (5.8)	64.0	CH	H-3, H-4, H-3′
3	2.12, m	33.5	CH2	H-2, H-4
4	2.68, m	32.2	CH2	H-2, H-6, H-10
5	/	142.1	C	H-3, H-4, H-7, H-9
6, 10	7.23, m	129.9	CH	H-4, H-8
7, 9	7.30, m	130.3	CH	/
8	7.19, m	128.0	CH	H-6, H-10
2′	/	174.1	C	H-3′, H-7′
3′	4.05, d (10.3)	61.5	CH	H-2
4′	1.70, m; 2.10, m	29.3	CH2	H-3′
5′	1.64, m; 1.97, m	28.2	CH2	H-3′, H-7′
6′	1.28, m; 1.75, m	28.5	CH2	H-4′
7′	3.16, m	42.5	CH2