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. Author manuscript; available in PMC: 2012 Jan 12.
Published in final edited form as: Tetrahedron Lett. 2011 Jan 12;52(2):219–223. doi: 10.1016/j.tetlet.2010.10.173

Table 1.

NMR [1H (500 MHz) 13C (125 MHz) D2O] assignments of the HCl salt of 1D, pH 2.4.

Label 1H 13C
pH
2.24		 δ
(ppm)		 mult 3JHH (Hz) δ (ppm)
C1 3.664
3.202		 dd
dd		 12.7 / 6.8
12.7 / 5.0		 47.83
C2 4.401 ddd 6.8 / 5.0 / 5.0 74.26
C3 4.014 d 5.0 77.36
C4 -- -- -- 69.48
C5 3.797
3.688		 d
d		 12.3
12.3		 63.75
CH3 1.332 s na 15.12