Table 1.

¹³C-NMR (125 MHz) and ¹H-NMR (500 MHz) data (CDCl₃) of roretziaxanthin (1).

Position	13C-NMR	1H-NMR		Position	13C-NMR	1H-NMR
	δ	δ	Mult.J (Hz)		δ	δ	Mult.J (Hz)
1	36.80		dd (13.5, 13.5)	1’	146.0
2	45.38	1.81	dd (13.5, 5.5)	2’	46.23	3.78	d (7.5)
		2.15	ddd (13.5, 5.5, 2.0)
3	69.19	4.32		3’	41.46	2.20	dd (18.5, 2.0)
						2.71	dd (18.5, 7.5)
4	200.42			4’	207.79
5	126.78			5’	136.92
6	162.25			6’	164.60
7	123.33	6.22	d (16.0)	7’	120.59	6.62	d (15.5)
8	142.35	6.43	d (16.0)	8’	141.39	6.95	d (15.5)
9	134.66			9’	135.25
10	135.16	6.31	d (11.0)	10’	137.51	6.37	d (11.5)
11	124.73	6.69~6.63	overlapped	11’	124.73	6.69~6.63	overlapped
12	139.67	6.45	d (15.5)	12’	140.49	6.49	d (11.5)
13	136.78			13’	136.92
14	133.81	6.33~6.31	overlapped	14’	134.34	6.33~6.31	overlapped
15	130.65	6.69~6.63	overlapped	15’	130.95	6.69~6.63	overlapped
16	29.15	1.32	s	16’	112.90	4.88	t (2.0)
						4.95	s
17	30.75	1.21	s	17’	18.08	1.52	s
18	14.04	1.95	s	18’	8.40	1.88	d (2.0)
19	12.85	2.01	s	19’	2.48/12.81	2.00/2.01	s
20	12.59	1.99	s	20’	2.48/12.81	2.00/2.01	s
OH		3.69	d (2.0)

Multiplicity: s: singlet, d: doublet, q: quartet, m: multiplet. ¹H- and ¹³C-NMR signals of 19′ and 20′ are indistinguishable.