Table 2: 1H, 13C NMR, and HMBC spectroscopic data of compound 2 (DMSO).

2
No. #δHδCHMBC

1196.2
22.22 (d, J = 19.0)42.8C-1, C-3, C-4a, C-7a, C-8
2.93 (dd, J = 19.0, 6.5)C-1, C-3, C-4a, C-8
33.52 (dd, J = 6.5, 7.0)28.3C-1, C-2, C-4, C-4a, C-7a, C-8
46.91 (d, J = 2.0)103.3C-3, C-5, C-6, C-7a, C-9
5135.2
66.83 (d, J = 2.0)104.0C-4, C-5, C-9
7164.2
7a148.0
4a145.1
81.35 (d, J = 7.0)21.0C-2, C-3, C-4a
9166.9
OCH33.95 (s)56.8C-9
7-OH11.1 (s)