Table I. ¹³C-NMR results for 1, 2, and 3.

Samples were analyzed at 300 K. The isolated product 1 was dissolved in MeCN-d₃ (99.8 atom % D), while 2 and 3 were dissolved in CDCl₃ (99.8 atom % D).

C	1	2	3
	δC	δC	δC
1	128.7	148.7	147.2
2	26.4	110.9	111.2
3	40.6	116.4	114.4
4	137.7	143.5	144.6
5	127.1	54.8	51.9
6	79.3	81.2	81.2
7	46.2	40.6	37.2
8	23.7	18.6	18.9
9	37.7	37.6	32.1
10	139.4	39.0	37.7
11	41.5	41.3	40.6
12	180.6	179.3	178.9
13	10.9	9.2	10.2
14	22.2	18.6	25.5
15	17.4	26.0	26.1