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. 2019 Aug 21;17(9):488. doi: 10.3390/md17090488

Table 2.

NMR data of compounds 3 and 4.

3 a 4 b
Unit Position δC, Type δH, Mult (J in Hz) δC, Type δH, Mult (J in Hz)
Val CO 172.0, C 172.8, C
α 57.1, CH 4.43, t (9.8) 59.4, CH 4.10, d (9.0)
β 30.3, CH 1.89, m 30.8, CH 1.97, m
γ 19.2, CH3 0.86, d (6.5) 19.4, CH3 1.02, d (6.6)
18.8, CH3 0.92, d (6.5) 19.2, CH3 0.91, d (6.8)
NH 6.43, d (9.1)
Pro CO 173.3, C 173.7, C
α 59.5, CH 4.31, d (5.8) 61.7, CH 4.35, dd (8.3, 2.4)
β 29.7, CH2 2.13, m 30.5, CH2 1.88, m
1.74, m
γ 24.7, CH2 1.88, m 24.2, CH2 1.63, m
1.04, m
δ 48.1, CH2 3.93, m 48.6, CH2 3.72, m
3.52, m 3.46, m
Tyr CO 172.4, C 173.9, C
α 50.6, CH 4.54, dd (13.3, 6.6) 51.2, CH 4.62, dd (11.2, 4.0)
β 35.9, CH2 2.42, dd (13.6, 9.2) 36.0, CH2 2.63, dd (13.1, 11.5)
1.87, dd (13.2, 6.2) 1.43, dd (13.2, 3.5)
γ 126.6, C 129.2, C
ortho 130.2, CH 6.77, d (7.8) 131.5, CH 6.92, d (8.3)
meta 115.9, CH 6.66, d (8.0) 115.9, CH 6.64, d (8.4)
para 155.9, C 157.3, C
NH 6.44, d (9.1)
N-Me-Phe CO 168.1, C 170.5, C
α 63.2, CH 4.82, t (6.8) 63.7, CH 5.28, dd (10.9, 3.4)
β 34.5, CH2 3.34, dd (14.0, 5.7) 35.4, CH2 3.16, dd (14.3, 3.5)
2.52, dd (13.9, 7.8) 2.97, dd (14.1, 9.3)
γ 137.9, C 139.4, C
ortho 129.4, CH 7.13, d (7.4) 130.7, CH 7.28, d (7.2)
meta 129.1, CH 7.24, d (7.5) 130.1, CH 7.30, d (7.3)
para 127.3, CH 7.23, d (7.3) 128.1, CH 7.17, d (7.5)
N-CH3 29.5, CH3 2.87, s 30.2, CH3 2.90, s
Ala CO 170.9, C 180.8, C
α 48.5, CH 4.67, d (7.9) 52.1, CH 4.19, m
β 18.6, CH3 1.32, d (7.3) 18.5, CH3 1.34, d (6.5)
NH 8.16, d (8.3)
N-Ac-Thr CO 169.7, C 173.0, C
α 55.4, CH 4.69, m 59.7, CH 4.47, d (5.2)
β 70.1, CH 5.53, q (5.9) 68.6, CH 4.17, q (5.9)
γ 17.0, CH3 1.18, d (6.5) 19.7, CH3 1.21, d (6.4)
NH 6.29, d (9.0)
CO 171.8, C 174.1, C
α 23.1, CH3 1.83, s 22.8, CH3 2.09, s

a,b Measured in CDCl3 and CD3OD, respectively.