Table 2. ¹³C NMR Data for Compounds 1 and 2(9) (Siphonochilone)^a.

C	1, δC (ppm)	2, δC (ppm)
2	137.8	137.5
3	119.3	119.0
3a	115.4	114.6
4	18.3	22.5
4a	49.3	45.0
5	83.0	34.2
6	35.3	154.2
7	35.0	126.6
8	212.8	204.0
8a	47.5	44.9
9	34.9	31.9
9a	148.7	149.3
3-Me	8.2	8.1
5-Me	19.7	18.7
8a-Me	19.0	16.6
OCOMe	22.6
OCOMe	170.2

^a13C NMR spectra are included in the SI.