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Table 2 1 H in Gossypolhemiquinone, a dimeric sesquiterpenoid identified in cotton (Gossypium)

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Table 2 1 H chemical shifts for gossypolhemiquinone (GHQ) (9) compared to the dimeric sesquiterpenoids gossypol (Goss) (1) and gossypolone (GQ) (2) (for carbon assignments refer to Fig. 1). C#TypeGoss (1)GHQ (9)C#TypeGQ (2)GHQ (9)δδδδ1C1-OH5.896.60 a21C21-OH6.596.39 a4Ar-H7.777.6522C22-OH13.0112.976C6-OH6.396.37 a26HC=O10.5810.507C7-OH15.1015.0527Ar-CH32.041.9711CHMe23.883.8228CHMe24.124.0512CH31.531.4829CH31.421.3913CH31.531.5330CH31.441.4214HC=O11.110.9015Ar-CH32.132.19 a Assignments for GHQ (9) C1-OH, C6-OH and C21-OH may be interchanged.

表2 半棉酚(gossypolhemiquinone,GHQ)(9)的¹H化学位移数据,与倍半萜二聚体棉酚(gossypol,Goss)(1)及棉酚酮(gossypolone,GQ)(2)的对应数据对比(碳谱归属参见图1)。 | 碳编号 | 基团类型 | 棉酚(1) δ值 | 半棉酚(9) δ值 | 碳编号 | 基团类型 | 棉酚酮(2) δ值 | 半棉酚(9) δ值 | | --- | --- | --- | --- | --- | --- | --- | --- | | 1 | C1-OH | 5.89 | 6.60ᵃ | 21 | C21-OH | 6.59 | 6.39ᵃ | | 4 | 芳环氢(Ar-H) | 7.77 | 7.65 | 22 | C22-OH | 13.01 | 12.97 | | 6 | C6-OH | 6.39 | 6.37ᵃ | 26 | 醛基质子(HC=O) | 10.58 | 10.50 | | 7 | C7-OH | 15.10 | 15.05 | 27 | 芳环甲基(Ar-CH₃) | 2.04 | 1.97 | | 11 | 异丙基(CHMe₂) | 3.88 | 3.82 | 28 | 异丙基(CHMe₂) | 4.12 | 4.05 | | 12 | 甲基(CH₃) | 1.53 | 1.48 | 29 | 甲基(CH₃) | 1.42 | 1.39 | | 13 | 甲基(CH₃) | 1.53 | 1.53 | 30 | 甲基(CH₃) | 1.44 | 1.42 | | 14 | 醛基质子(HC=O) | 11.1 | 10.90 | - | - | - | - | | 15 | 芳环甲基(Ar-CH₃) | 2.13 | 2.19 | - | - | - | - | 注:ᵃ 半棉酚(9)的C1-OH、C6-OH及C21-OH的谱峰归属可相互互换。

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