TABLE 1.

NMR data for serrawettin W2 in dimethyl sulfoxide-d₆

Residue and position(s)	δcf	δH(JH,H, Hz)
d-Leu (1)
NH		7.82 (8.8)
Cα		—a
Cβ	24.8	—d
Cγ	23.4	1.64 m
Cδ		—c
Cδ		—c
l-Ser (2)
NH		8.08 (8.2)
Cα		—a
Cβ	61.3	3.63 (11.0, 6.4), 3.56 (11.0, 6.8)
l-Thr (3)
NH		8.03 (8.2)
Cα	58.5	4.11 (8.4, 2.9)
Cβ	65.4	4.24 m
Cγ	20.2	0.97 (6.4)
d-Phe (4)e
NH		7.46 (7.0)
Cα		—a
Cβ	37.2	3.14 (13.7, 4.5), 2.89 (13.7, 7.2)
l-Ile (5)
NH		8.49 (6.4)
Cα	57.6	3.76 (8.2, 6.8)
Cβ	34.7	1.77 m
Cγ	40.4	—d
Cδ		—c
Cδ		—c
3-Hydroxy-decanoyl
C-2	39.0	2.64 (14.5, 3.0), 2.36 (14.5, 5.9)
C-3	71.8	4.92b m
C-4	31.1	1.53 br m
C-5–C-9		1.23 br
C-10		—c

^a—, the α protons of Phe, Ser, and Leu appear at δ 4.48 to 4.32 as an unresolved multiplet (m). 

^bPartly obscured by the water resonance at δ 4.83 br. 

^c—, five unresolved methyl resonances appear at δ 0.86 to 0.78. 

^d—, the Leuβ and Ileγ protons appear as overlapping multiplets at δ 1.45 to 1.34, and the Leuβ′ and Ileγ′ protons appear as overlapping multiplets at δ 1.18 to 1.09. 

^eThe aromatic protons appear as an unresolved multiplet at δ 7.16 to 7.05, and the aromatic carbons appear at δ C2′, 6′, 3′ and 5′ 128.1, 129.1; C1′ 126.5; and C4′ 136.8 

^fThe six carbonyl carbon signals appear at δ 172.1, 171.3, 170.6, 170.6, 169.5, and 168.8.