The Granulation-Inhibiting Principles from Eucalyptus globulus LABILL. II. The Structures of Euglobal -Ia1, -Ia2, -Ib, -Ic, -IIa, -IIb and -IIc

MUTSUO KOZUKA; TOKUNOSUKE SAWADA; FUMIKO KASAHARA; EIJI MIZUTA; TOSHIO AMANO; TAKEYA KOMIYA; MINORU GOTO

doi:10.1248/cpb.30.1952

The Granulation-Inhibiting Principles from Eucalyptus globulus LABILL. II. The Structures of Euglobal -Ia₁, -Ia₂, -Ib, -Ic, -IIa, -IIb and -IIc

MUTSUO KOZUKA, TOKUNOSUKE SAWADA, FUMIKO KASAHARA, EIJI MIZUTA, TOSHIO AMANO, TAKEYA KOMIYA, MINORU GOTO

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Keywords: Eucalyptus globulus

JOURNAL FREE ACCESS

1982 Volume 30 Issue 6 Pages 1952-1963

DOI https://doi.org/10.1248/cpb.30.1952

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Abstract

The structures of seven novel potent granulation-inhibiting principles isolated from the buds of Eucalyptus globulus LABILL., were examined on the basis of physicochemical data, especially of ¹H-nuclear magnetic resonance (NMR), ¹³C-NMR, mass spectrum (MS) and circular dichroism (CD). The structures (but not the complete stereochemistry) of euglobal-Ia₁, -Ia₂, -Ib, -Ic, -IIa, -IIb and -IIc were proposed to be 2-7 and 8, respectively.

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