Table 2.

¹H (CDCl₃, 400 MHz) and ¹³C NMR (CDCl₃, 100 MHz) data of compounds 4.

No	1H-NMR data of compound 4	13C-NMR data of compound 4
2	–	140.5
2a	2.40 (3 H, s, H-2a)	17.8
3	2.90 (1 H, m, H-3)	55.7
4	7.21 (1H, d, J = 7.6 Hz, H-4),	141.2
5	7.04 (1H, d , J = 7.6 Hz, H-5)	130.8
6	–	137.9
7	7.08 (1H, d, J = 0.8 Hz, H-7)	127.6
8	–	138.3
8a	–	129.1
1′	1.40 (2 H, m, H-1′)	22.0
2′	1.98 (2 H, m, H-2′)	40.3
3′	–	210.5
4′	1.25 (1H, septet, H-4′)	27.3
4′a	1.21 (3H, d, J = 7.2 Hz, H-4′a)	18.9
4′b	1.25 (3H, d, J = 7.2 Hz, H-4′b)	18.2
1″	3.00 (2 H, d, J = 2.4 Hz,H-1″)	29.7
2″	–	203.5
3″	–	81.9
3″a	1.04 (3H, s, H-3″a)	21.4
3″b	0.87 (3H, s, H-3″b)	21.5