Table 1.

¹H and ¹³C NMR data of TTN I-1 (CDCl₃, † in ppm, J in Hz)^a

no.	1H NMR	13C
1	1.01 (3H, t, 7.6)	13.64
2	2.24 (2H, q, 7.6)	19.21
3		140.03
4	5.40 (1H, t, 7.2)	132.91
5	2.11 (2H, o)	25.46
6	1.21 (1H, m)	37.75
6	1.34 (1H, o)b
7	1.31 (1H, o)	29.84
7-Me	0.85 (3H, d, 6.5)	19.35
8	1.11 (2H, o)	44.82
9	1.50 (1H, m)	30.07
9-Me	0.83 (3H, d, 6.5)	19.25
10	1.29 (2H, o)	33.17
11	1.38 (1H, m)	31.88
11	1.54 (1H, m)
12	3.73 (1H, m)	73.42
13	2.65 (1H, m)	52.68
13-Me	1.08 (3H, d, 7.1)	13.64
14		215.76
15	2.46 (1H, dd, 2.5, 16.8)	46.48
15	2.78 (1H, o)
16	4.32 (1H, br d, 9.8)	66.55
17	1.69 (1H, m)	42.74
17-Me	0.94 (3H, d, 7.1)	10.31
18	5.01 (1H, m)	73.91
18-Me	1.29 (3H, d, 6.4)	18.40
1′		170.07
2′	2.87 (1H, dd, 3.6, 16.1)	40.66
2′	2.77 (1H, o)
3′	5.19 (1H, m)	63.82
4′		142.10
5′		143.02
5′-Me	2.27 (3H, s)	10.12
6′		165.70
7′		164.83
1″	6.24 (1H, dd, 17.5, 10.5)	140.03
2″	5.10 (1H, d, 17.5)	110.13
2″	4.91 (1H, d, 10.5)

^a1H NMR at 700 MHz, ¹³C NMR at 175 MHz, and assignments were based on HSQC, COSY, and HMBC experiments

^b‘o’ denotes overlapping signals