Table 2.

¹³C NMR spectroscopic data of silvaticusins A–C (1–3) (δ in ppm)

No	1a	2a	3b
1	31.0, CH2	30.9, CH2	30.3, CH2
2	41.5, CH2	19.0, CH2	26.4, CH2
3	19.1, CH2	40.9, CH2	70.6, CH
4	34.0, C	34.0, C	55.1, C
5	57.8, CH	48.9, CH	43.6, CH
6	73.3, CH	32.3, CH2	30.9, CH2
7	99.9, C	98.1, C	72.6, CH
8	53.5, C	59.8, C	60.8, C
9	40.0, CH	48.9, CH	53.3, CH
10	36.1, C	36.1, C	37.6, C
11	27.1, CH2	28.2, CH2	17.0, CH2
12	76.5, CH	74.7, CH	36.8, CH2
13	57.9, CH	55.3, CH	45.8, CH
14	74.3, CH	71.9, CH	74.5, CH
15	73.3, CH	203.3, C	206.6, C
16	156.3, C	149.7, C	148.5, C
17	111.1, CH2	119.1, CH2	115.6, CH2
18	33.6, CH3	20.8, CH3	205.8, CH
19	22.5, CH3	32.4, CH3	8.6, CH3
20	65.7, CH2	66.4, CH2	17.3, CH3

^aRecorded on a 500 MHz NMR spectrometer in pyridine-d₅. ^bRecorded on a 600 MHz NMR spectrometer in pyridine-d₅