7 article(s) from Harunari, Enjuro
- Full Research Paper
- Published 13 Jan 2022
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Figure 1: Structures of tenacibactins K–M (1–3).
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Figure 2: Key 2D-NMR correlations for 1–3.
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Figure 3: (a) Partial 1H NMR spectra of 1 at 25 and 50 °C in DMSO-d6; (b) magnified HMBC spectrum of 1 at 25 ...
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Figure 4: MS/MS spectrum of 1 acquired on a quadrupole time-of-flight mass spectrometer in the negative ion m...
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Scheme 1: MS/MS fragmentation pathway for compound 1.
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- Full Research Paper
- Published 27 Aug 2021
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Figure 1: Structures of nomimicins A–D (4 and 1–3).
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Figure 2: COSY and key HMBC correlations for 1.
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Figure 3: Relative configuration of 1 determined by ROESY analysis.
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Figure 4: Experimental ECD spectra of 1, 2, and 4 and calculated ECD spectrum of 4.
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Figure 5: Four tautomers 4a–4d of the tetronic acid moiety of 4 and calculated ECD spectra.
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Figure 6: COSY and key HMBC correlations for 3.
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Figure 7: Relative configuration of 3 determined by NOESY analysis.
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- Full Research Paper
- Published 05 Nov 2020
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Figure 1: Structure of the nocarimidazoles 1–4 and the bulbimidazoles 5–7.
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Figure 2: COSY and key HMBC correlations for 1 and 2.
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Scheme 1: Synthesis of the model compounds 8 and 9.
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Figure 3: 1JC,H coupling constant for the imidazole ring of the natural products 1 and 5 and the model compou...
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Figure 4: Determination of the absolute configuration of 1 (a), 4 (b), and 5 (c) by the Ohrui–Akasaka method.
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Figure 5: Stereochemical diversity of the anteiso-chain chirality in microbial metabolites.
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- Full Research Paper
- Published 29 Jul 2020
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Figure 1: Structures of the compounds 1–5.
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Figure 2: COSY (bold lines) and selected HMBC correlations (arrows) for 1–4.
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Figure 3: a) Distribution of positive (red) and negative (blue) Δδ(S − R) values (in ppm) calculated from the ...
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- Published 02 Mar 2020
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Figure 1: Structures of (6E,8Z)- and (6E,8E)-5-oxo-6,8-tetradecadienoic acids (1 and 2).
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Figure 2: COSY and key HMBC correlations for 1 and 2.
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Figure 3: Spin system simulation for the C8–C9 double bond of 2.
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Figure 4: Natural keto fatty acids of various origins.
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Figure 5: PPAR activation by 1 and 2.
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- Published 30 Sep 2019
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Figure 1: Structure of (2Z,4E)-3-methyl-2,4-decadienoic acid (1).
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Figure 2: COSY and key HMBC correlations for 1.
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Figure 3: Methylation pattern that can occur in fatty acids and polyketides.
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Scheme 1: C-Methylation of alkenyl carbon in sphingolipid biosynthesis.
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Figure 4: Incorporation of 13C-labeled precursors into 1.
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Scheme 2: Biosynthesis of tuberculostearic acid in Mycobacterium.
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Scheme 3: Possible methylation mechanism for compound 1.
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- Full Research Paper
- Published 08 Mar 2017
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Figure 1: The structure of butyrolactol A (1).
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Figure 2: Cyanobacterial polyketides bearing a tert-butyl group.
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Figure 3: Actinomycete metabolites possessing a contiguous 1,2-diol system.
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Figure 4: Feeding experiments of 13C-labeled precursors into 1 detected by 2D-INADEQUATE NMR experiments. (a)...
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Figure 5: Organization of the biosynthesis gene cluster for 1. Blue, transcriptional regulator; pink, PKS for...
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Figure 6: Biosynthetic pathway of hydroxymalonyl-ACP. Adapted from [24].
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Figure 7: Incorporation of L-valine-d8 into 1. (a) 1H NMR spectrum of natural 1 and 2H NMR spectrum of L-vali...
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Figure 8: Incorporation of 13C- and 2H-labeled precursors into 1.
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