The structures of juferin and juniferidin

Abstract

In the region of olefinic protons in the PMR spectrum of juferin there are two doublet signals at 5.38 ppm (J = 16 Hz) and 5.86 ppm (J = 16 Hz), and also a triplet signal at 5.21 ppm i(J1 = J~ = 7.5 Hz). A multiplet at 4.52 ppm (~/2Z =i0 Hz) is due to a hemihydro~rylic proton. Two doublet signals appear in the weak-field region at 6.81 ppm (J = i0 Hz) and 7… (More)
DOI: 10.1007/BF00937642

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