Table 1.

¹H-NMR and ¹³C-NMR data of the compound, 9179B.

Position	13C-NMR a	1H-NMR b
1	n.d. c
2	120.1	5.97 (1H, d, J = 15.5)
3	146.9	7.10 (1H, d, J = 15.5)
4	134.3
5	141.1	5.86 (1H, d, J = 9.5)
6	41.6	4.48 (1H, m)
7	201.4
8	124.6
9,13	131.8	7.81 (2H, d, J = 9.0)
10,12	111.9	6.67 (2H,d, J = 9.0)
11	155.4
4-Me	12.7	1.80 (3H, s)
6-Me	18.2	1.22 (3H, d, J = 6.5)
N-Me2	40.2	3.02 (6H, s)

^a: 500MHz in CD₃OD; ^b: 500MHz in CD₃OD; ^c: Not detected.