Table 1.

COSY assignment of 8,9–11,12-DiEp-13-HEDE using ¹H-¹H gradient double quantum COSY (methanol-d₄, 400 MHz)

F2 axis	F1 axis	Correlation
ppm	ppm
1.33	0.89	H20–19
1.38	1.33	H18–17
1.65	2.29	H3–2
1.66	2.08	H4–3
1.92	1.76	H10′-10″
2.1	1.38	H17–16
2.83	2.29	H8–7
2.84	1.93	H10′-9
2.84	1.76	H10″-9
3.00	1.90	H11–10′
3.00	1.76	H11–10″
4.41	2.84	H13–12
5.35	4.39	H14–13
5.48	2.29	H7–6
5.51	2.09	H5–4
5.61	5.35	H15–14
5.62	2.08	H16–15