Table 1.

¹H and ¹³C NMR (500 and 125 MHz in CD₃OD) data for compound 1.

Position	δ 1H (mult, J, Hz)	δ 13C	Position	δ 1H (mult, J, Hz)	δ 13C
2	----	78.8, s	11	1.96, dd, 15.7, 1.4 2.22, dd, 15.7, 7.8	40.9, t
3	3.88, d, 6.9	67.0, d	12	1.55, d, 7.8	52.6, d
4	7.10, d, 6.9	134.2, d	13	----	72.1, s
4a	----	140.2, s	14	1.55, m 1.77, m	42.2, t
5	----	190.6, s	15	1.82, m 1.91, dd, 13.7, 4.0	31.6, t
5a	----	111.7, s	16	3.70, dd, 12.2, 4.0	72.2, d
6	----	166.3, s	17	----	41.8, s
7	6.60, d, 2.0	109.7, d	18	1.04, s	25.6, q
8	----	167.3, s	19	1.44, s	24.7, q
9	6.96, d, 2.0	109.5, d	20	1.17, s	24.4, q
9a	----	137.8, s	21	0.56, s	29.2, q
10	----	196.3, s	22	0.71, s	16.3, q
10a	----	83.4, s