. 2022 Sep 14;20(9):576. doi: 10.3390/md20090576

Table 1.

¹H and ¹³C NMR Data for Alcyopterosins T, U, and V (1–3).

Position	Alcyopterosin T (1)		Alcyopterosin U (2)		Alcyopterosin V (3)
Position	δ_C, ¹ Type	δ_H, ² Mult. (J)	δ_C, ¹ Type	δ_H, ² Mult. (J)	δ_C, ¹ Type	δ_H, ² Mult. (J)
1	47.1, CH₂	2.79, s	42.2, CH₂	3.03, s	44.8, CH₂	3.04, s
2	143.2, C		151.5, C		146.7, C
3	131.1, C		133.0, C		122.5, C
4	72.5, CH₂	4.57, t (7.9)	71.9, CH₂	4.60, t (7.6)	63.2, CH₂	4.25, dd (2.5, 12.6)
						3.81, dd (6.1, 12.6)
5	27.7, CH₂	3.15, t (7.9)	28.6, CH₂	3.28, t (7.7)	82.2, CH	5.55, br dd (2.0, 5.9)
6	131.4, C		142.2, C		142.4, C
7	135.9, C		138.2, C		130.0, C
8	128.0, CH	7.06, s	127.4, CH	7.64, s	131.8, CH	7.24, s
9	143.4, C		135.4, C		141.1, C
10	48.5, CH₂	2.73, s	211.4, C		47.0, CH₂	2.74, s
11	40.4, C		46.3, C		40.9, C
12	62.5, CH₂	5.16, s	61.0, CH₂	5.25, s	170.8, C
13	20.7, CH₃	2.38, s	21.0, CH₃	2.47, s	18.0, CH₃	2.37, s
14	29.7, CH₃	1.17, s	26.2, CH₃	1.24, s	28.8, CH₃	1.16, s
15	29.7, CH₃	1.17, s	26.2, CH₃	1.24, s	28.8, CH₃	1.19, s
1′	171.1, C		171.2, C
2′	21.7, CH₃	2.09, s	21.8, CH₃	2.10, s

¹ CDCl₃, 200 MHz, shift, and type determined from HSQC and HMBC; ² CDCl₃, 600 MHz, J in Hz.