Careyarboside A: A New Flavan-3-ol Glycoside from the Stems of Careya arborea (Lecythidaceae)

Table 2

¹H (700 MHz) data of compounds 4–7 (δ in ppm)^a.

Position	4^b	5^b	6^b	7^c (s)
	δ (J in Hz)
2		6.70 t (2.1)	7.20 d (2.1)	7.06
3	6.58 s
4		6.62 t (2.1)
5	6.58 s
6		6.91 t (2.1)	7.14 d (2.1)	7.06
7			2.98 t (7.0)
8			4.07 dt (7.0, 1.4)
1′	5.62 d (7.7)	5.67 d (7.7)	5.51 d (7.7)
2′	4.35^d	4.34 t (9.1)	4.27 t (9.1)
3′	4.35^d	4.37 m	4.30 t (9.1)
4′	4.35^d	4.38 t (9.1)	4.35 t (9.1)
5′	3.94 m	4.04 m	3.98 m
6′	4.43 dd (11.9, 2.1)	4.47 dd (11.9, 2.1)	4.51 dd (11.9, 2.1)
	4.36 dd (11.9, 4.9)	4.38 dd (11.9, 4.9)	4.41 dd (11.9, 4.9)
OCH3	3.71 s	3.67 s

^aAssignments confirmed by ¹H-¹H COSY, HSQC, and HMBC experiments. ^bMeasured for pyridine-d₅ solution. ^cMeasured for CD₃OD solution. ^dOverlapped signals are reported without designating multiplicity.