. 2021 Jun 19;19(6):348. doi: 10.3390/md19060348

Table 1.

¹H (400 MHz) and ¹³C (125 MHz) NMR spectroscopic data for 1–4 in CD₃OD.

Position	1		2/3		4
Position	δ_C, Type	δ_H (J in Hz)	δ_C, Type	δ_H (J in Hz)	δ_C, Type	δ_H (J in Hz)
2	164.8, C		164.8, C		166.7, C
3	119.1, C		118.2, C		116.8, C
4	178.4, C		178.9, C		176.8, C
4a	135.9, C		115.4, C		116.5, C
5	114.5, C		123.2, C		123.0, C
6	114.6, CH	6.92, d, 2.4	110.0, CH	7.07, s	110.3, CH	7.09, s
7	165.1, C		151.4, C		152.6, C
8	102.3, CH	7.10, d, 2.4	138.2, C		140.3, C
8a	159.5, C		147.1, C		147.2, C
9	10.3, CH₃	2.02, s	10.2, CH₃	2.02, s	96.9, CH	5.73, s
10	171.4, C		172.4, C		35.2, CH₂	H_a 2.77, dd, 17.9, 3.7 H_b 2.68, dd, 17.9, 10.7
11	53.5, CH₃	3.92, s	53.5, CH₃	3.89, s	63.9, CH	4.40, m
12	57.0, CH₃	3.92, s	57.2, CH₃	3.96, s	20.8, CH₃	1.37, d, 6.2
13					172.1, C
14					53.3, CH₃	3.87, s
15					57.2, CH₃	3.96, s
1′	42.6, CH₂	H_a 2.92, dd, 14.0, 8.0 H_b 2.83, dd, 14.0, 5.1	42.4, CH₂	H_a 2.95, dd, 14.1, 7.9 H_b 2.83, dd, 14.1, 5.1	18.8, CH₃	1.19, d, 6.0
2′	67.1, CH	4.25, m	67.1, CH	4.29, m	83.4, CH	3.60, m
3′	23.7, CH₃	1.29, d, 6.3	23.6, CH₃	1.29, d, 6.3	73.4, CH	3.54, m
4′					18.3, CH₃	1.13, d, 6.0