Table 1: 1H, 13C NMR, and HMBC spectroscopic data of compound 1 (CD3OD).

1
No. #δHδCHMBC

27.04 (s)141.9C-9, C-3, C-4, C-6
3109.9
476.8
52.39 (d, J = 13.5)36.6C-4, C-6, C-7, C-8
2.52 (dd, J = 2.5, 13.5)C-3, C-4, C-6, C-7, C-8
64.8472.6C-2, C-4, C-7
7169.4
81.65 (s)25.3C-3, C-4, C-5
9137.4
106.34 (d, J = 2.1)101.1C-3, C-12
116.21 (d, J = 2.1)101.0C-9, C-12, C-13
12165.2
13168.6
OCH33.84 (s)51.8

Splitting cannot be calculated due to overlapping with solvent signal.