Research Article
Careyarboside A: A New Flavan-3-ol Glycoside from the Stems of Careya arborea (Lecythidaceae)
Table 1
1H (700 MHz) data of compounds 1–3 in pyridine-d5 (δ in ppm)a.
| | Position | 1 | 2 | 3 | | δ (J in Hz) |
| | 2 | 5.18 d (7.0) | 5.29 d (7.0) | 5.38 brs | | 3 | 4.55 m | 4.68 m | 4.76 m | | 4 | 3.50 dd (16.1, 4.9) | 3.67 dd (16.1, 5.6) | 3.54 dd (16.1, 3.5) | | 3.32 dd (16.1, 7.7) | 3.36 dd (16.1, 7.7) | 3.40 dd (16.1, 4.9) | | 6 | 7.10 d (2.1) | 6.71 d (2.1) | 6.70 d (2.1) | | 8 | 6.72 d (2.1) | 6.66 d (2.1) | 6.66 d (2.1) | | 2′, 6′ | 7.18 s | 7.29 s | 7.48 s | | 1″ | 5.64 d (7.7) | | | | 2″ | 4.34b | | 3″ | 4.34b | | 4″ | 4.41 t (9.1) | | 5″ | 3.96 m | | 6″ | 4.39 dd (11.2, 4.9) | | OCH3 | 4.00 s |
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aAssignments confirmed by 1H-1H COSY, HSQC, and HMBC experiments. bOverlapped signals are reported without designating multiplicity.
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