Table 3. Chemical shift ranges characteristic of open prenyl groups.

Prenyl groups	Position, δC and δH in ppm					References
	1	2	3	4	5
	21–22	121–122	132–136	25–26	17–18	57, 119, 67, 82, 77 and 51
	3.15–3.45	5.00–5.3		1.50–1.80	1.50–1.80
	28–34	74–78	145–150	109–112	17–19	69, 80, 100, 112 and 163
	2.80–3.30	4.00–4.50		4.70–5.00	1.75–1.85
	120–125	135–142	70–83	25–31	25–31	51, 141 and 151
	6.80–6.95	6.30–6.60		1.30–1.50	1.30–1.50
	122–124	133–135	142–44	118–119	18–19	112 and 151
	6.70–6.90	6.40–7.00		5.00–5.2	1.8–2.00
	32	129.5	140	72.4	18.5	131
	3.4	5.4		3.95	1.80
	31	154	141	198	10.5	53
	3.6	6.5	9.3		1.8
	39	148	113.3	27.1	27.1	143
		6.2	5.33	1.4	1.4