. Author manuscript; available in PMC: 2023 Dec 6.

Published in final edited form as: Planta Med. 2023 Mar 28;89(12):1178–1189. doi: 10.1055/a-2063-5481

Table 1.

¹³C NMR spectroscopic data (100MHz) for compounds 1–5 compared with the literature data of 3 (δ in ppm).

Position	1^*	2^*	3 (Lit.)¹⁷	3	4	5
Position	δ_C, type^(a)	δ_C, type^(a)	δ_C, type^(b)	δ_C, type^(b)	δ_C, type^(b)	δ_C, type^(b)
1	162.9, C	162.8, C	161.6, C	161.7, C	160.0, C	159.5, C
2	110.2, CH	110.3, CH	109.5, CH	109.7, CH	118.6, C	118.0, C
3	139.7, CH	139.5, CH	141.1, CH	141.4, CH	139.5, CH	140.4, CH
4	108.5, CH	108.4, CH	115.3, C	115.6, C	107.9, C	108.4, CH
4a	161.0, C	161.0, C	153.8, C	154.0, C	157.3, C	157.6, C
5	84.8, CH	89.8, CH	70.3, CH	70.6, CH	70.5, CH	70.6, CH
6	31.2, CH	30.6, CH	27.5, CH	27.8, CH	27.9, CH	27.9, CH
7	37.4, CH₂	37.4, CH₂	33.2, CH₂	33.5, CH₂	33.5, CH₂	33.6, CH₂
8	178.8, C	178.5, C	177.6, C	177.9, C	178.0, C	178.0, C
8a	38.7, CH₂	40.0, CH₂	100.1, C	100.3, C	101.0, C	100.6, C
9	198.3, C	198.8, C	187.7, C	187.9, C	188.3, C	188.0, C
9a	108.5, C	108.6, C	106.2, C	106.5, C	106.4, C	106.6, C
10a	84.8, C	84.8, C	80.3, C	80.6, C	80.8, C	80.7, C
11	21.0, CH₃	20.9, CH₃	17.5, CH₃	17.7, CH₃	17.8, CH₃	17.8, CH₃
12	63.2, CH₂	63.9, CH₂	64.5, CH₂	64.8, CH₂	64.7, CH₂	65.5, CH₂
13			170.0, C	170.3, C	170.6, C	170.6, C
14			20.4, CH₃	20.6, CH₃	21.0, CH₃	20.9, CH₃
15			169.6, C	169.8, C	170.7, C	170.7, C
16			20.6, CH₃	20.9, CH₃	21.1, CH₃	21.1, CH₃
1′			161.6, C	161.7, C	161.8, C	159.5, C
2′			109.5, CH	109.7, CH	110.1, CH	118.0, C
3′			141.1, CH	141.4, CH	139.6, CH	140.4, CH
4′			115.3, C	115.6, C	117.3,C	108.4, CH
4a′			153.8, C	154.0, C	154.9, C	157.6, C
5′			70.3, CH	70.6, CH	69.6, CH	70.6, CH
6′			27.5, CH	27.8, CH	27.8, CH	27.9, CH
7′			33.2, CH₂	33.5, CH₂	33.4, CH₂	33.6, CH₂
8′			177.6, C	177.9, C	177.9, C	178.0, C
8a′			100.1, C	100.3, C	100.7, C	100.6, C
9′			187.7, C	187.9, C	188.3, C	188.0, C
9a′			106.2, C	106.5, C	106.6, C	106.6, C
10a′			80.3, C	80.6, C	80.5, C	80.7, C
11′			17.5, CH₃	17.7, CH₃	17.6, CH₃	17.8, CH₃
12′			64.5, CH₂	64.8, CH₂	64.3, CH₂	65.5, CH₂
13′			170.0, C	170.3, C	170.1, C	170.6, C
14′			20.4, CH₃	20.6, CH₃	20.5, CH₃	20.9, CH₃
15′			169.6, C	169.8, C	169.9, C	170.7, C
16′			20.6, CH₃	20.9, CH₃	21.1, CH₃	21.1, CH₃

Atom numbering according to compounds 3–5 for better comparison;

CD₃OD,

CDCl₃;

see Supporting Information for NMR spectra; Assignments were supported by 2D HSQC and HMBC experiments