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. Author manuscript; available in PMC: 2018 Dec 21.
Published in final edited form as: New J Chem. 2017 Oct 20;41(24):14862–14870. doi: 10.1039/C7NJ03376A

Table 1.

Correlation for 1H (400 MHz), 13C (100 MHz) and HMBC correlation data of compound 13 in CDCl3.

Position δH (J in Hz) δC HMBC (C →H)
1 – 169.5 H-10, H-3
2 – 126.6 –
3 7.68 (s) 134.5 H-4, H-10
4 7.50 (d, 8) 129.9 H-3, H-6
5 6.74 (t, 8) 112.6 H-4
6 7.39 (d, 8) 133.5 H-4, H-9
7 – 133.3 H-5
8 – 151.2 H-9, H-6, H-4
9 2.49 (s) 18.2 H-6
10 2.20 (s) 14.9 H-3, H-20