Table 2. ¹³C NMR Spectroscopic Data of 1–4 and Argentatin C (11).

position	1	2	3	4	11
1	33.5 CH2	33.3 CH2	35.8 CH2	33.4 CH2	33.3 CH2
2	37.5 CH2	37.5 CH2	34.6 CH2	37.5 CH2	37.4 CH2
3	216.6 C	216.5 C	217.7 C	216.6 C	216.6 C
4	50.2	50.2 C	47.4 C	50.2 C	50.2 C
5	48.5 CH	48.5 CH	51.2 CH	48.5 CH	48.4 CH
6	21.4 CH2	21.4 CH2	19.3 CH2	21.4 CH2	21.4 CH2
7	26.1 CH2	25.9 CH2	26.2 CH2	25.9 CH2	25.9 CH2
8	47.9 CH	47.5 CH	134.3 C	47.6 CH	47.5 CH
9	20.8 C	20.6 C	133.3 C	20.9 C	20.8 C
10	25.9 C	26.2 C	36.9 C	26.1 C	25.9 C
11	26.4 CH2	26.5 CH2	20.8 CH2	26.4 CH2	26.0 CH2
12	32.7 CH2	33.5 CH2	31.9 CH2*	32.6 CH2	32.5 CH2
13	45.3 C	46.2 C	45.3 C*	45.3 C	45.3 C
14	46.5 C	46.3 C	47.2 C*	46.8 C	46.6 C
15	47.9 CH2	48.4 CH2	43.9 CH2	47.7 CH2	47.8 CH2
16	72.4 CH	73.8 CH	74.1 CH	72.8 CH	72.7 CH
17	57.1 CH	58.6 CH	57.1 CH	57.0 CH	56.7 CH
18	18.9 CH3	21.5 CH3	19.2 CH3	20.0 CH3	18.9 CH3
19	29.8 CH2	30.2 CH2	18.4 CH3	29.8 CH2	29.8 CH2
20	26.5 CH	78.6 C	78.4 C	31.5 CH	26.3 CH
21	17.7 CH3	27.1 CH3	27.6 CH3	18.5 CH3	17.7 CH3
22	26.4 CH2	27.2 CH2	27.1 CH2	33.8 CH2	26.4 CH2
23	31.4 CH2	22.5 CH2	22.5 CH2	28.6 CH2	31.1 CH2
24	73.8 CH	69.7 CH	69.6 CH	80.3 CH	75.2 CH
25	77.2 C	76.0 C	76.0 C	73.2 C	73.0 C
26	25.6 CH3	27.4 CH3	27.4 CH3	23.1 CH3	22.8 CH3
27	25.9 CH3	28.1 CH3	28.1 CH3	26.6 CH3	26.8 CH3
28	20.8 CH3	20.8 CH3	26.1 CH3	20.8 CH3	20.7 CH3
20	22.2 CH3	22.1 CH3	21.3 CH3	22.2 CH3	22.1 CH3
30	20.0 CH3	19.9 CH3	24.9 CH3	19.0 CH3	19.9 CH3
OMe	57.1 CH3