Table 4.

Results from the NOESY and HMBC spectra of the pairs 3d–4d and 5d–6d *.

Blue and red arrows indicate the NOESY and HMBC cross peaks, respectively.
	3d	4d	5d	6d
NOESY H1′-H6	o	x	o	x
NOESY H1′-H2′′	x	o	x	o
NOESY H4-H2′′	x	x	x	x
HMBC H1′-C5	x	o	x	o
HMBC H1′-C3	o	x	o	x

* The presence of a cross peak is indicated by (x). When it contributes to the positional verification, it is underlined (x). See Table 1, Table 2 and Table 3 for positions of the relevant protons and carbons in the NMR spectra of the compounds 3d, 4d, 5d and 6d.