Table 4. Chemical shift ranges characteristic of heterocyclic prenyl groups.

Prenyl groups	Position, δC and δH in ppm					References
	2	3	4	5	6
	76–80	127–132	115–123	27–29	27–29	52, 67, 82, 90, 97 and 98
		5.40–5.60	6.20–6.65	1.40–1.50	1.40–1.50
	79–81	76–77	68–70	25–28	19–20	66, 90 and 128
		3.50–3.60	4.50–4.60	1.20–1.25	1.40–1.55
	76–80	69–70	26–33	25–27	20–21	87, 90, 92, 128, 131 and 146
		3.65–3.85	2.40–2.80	1.30–1.40	1.10–1.27
	81.1	49.3	192.2	25.6	25.6	90
		2.80		1.48	1.48
	75–76	32–34	23–24	26–27	26–28	54 and 87
		1,80–1.90	2.75–2.85	1.30–140	1.30–140
	90–92	26–32	71–73	25–27	24–26	57, 91, 126, 138 and 142
	4.60–3.75	3.00–3.25		1.25–1.30	1.20–1.27
	97–98	73–75	71–72	25–27	25–27	91
	3.30–3.50	5.10–5.40		1.65–1.72	1.65–1.72