H. Takayanagi

Publications255
h-index23
Citations1,952
Highly Influential Citations24
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Hancokinol, a novel triterpene, from Cynanchum hancokianum
Abstract Absolute stereochemistry of hancokinol, a novel triterpene, isolated from Cynanchum hancokianum , has been elucidated by means of spectroscopic and X-ray analyses.
Terpendoles, novel ACAT inhibitors produced by Albophoma yamanashiensis. III. Production, isolation and structure elucidation of new components.
Eight new components of terpendoles E to L were isolated and characterized from the culture broth of Albophoma yamanashiensis using a different production medium. All the structures were elucidated… Expand
Terpendoles, Novel ACAT Inhibitors Produced by Albophoma yamanashiensis. Part 2. Structure Elucidation of Terpendoles A, B, C and D.
Terpendoles, novel ACAT inhibitors produced by Albophoma yamanashiensis. II. Structure elucidation of terpendoles A, B, C and D.
Structures of terpendoles A, B, C and D, novel acyl-CoA: cholesterol acyltransferase (ACAT) inhibitors, were determined by spectroscopic studies. All terpendoles consist of diterpene and indole… Expand
The Crystal Structure of Phenanthrene: Picric Acid Molecular Complex
The crystal structure of phenanthrene:picric acid molecular complex was determined by X-ray crystal analysis. Phenanthrene and picric acid molecules are stacked alternately along the c-axis, making… Expand
Convenient synthesis of 7′ and 6′-bromo-d-tryptophan and their derivatives by enzymatic optical resolution using d-aminoacylase
Abstract Compounds 7′ and 6′-bromo- d -tryptophan ( 1 and 2 ) which are important derivatives for the synthesis of the chloropeptin and kistamycin A, respectively, were conveniently synthesized by… Expand
Absolute helical arrangement of stacked benzene rings: heterogeneous double-helical interaction comprising a hydrogen-bonding belt and an offset parallel aromatic-aromatic-interaction array.
Two novel hexacyclic triterpenoids from Prunella vulgaris
Abstract Two new hexacyclic triterpenoids, isolated as their methyl esters from the roots of Prunella vulgaris , were established by spectroscopic evidence and chemical correlation to be (12 R ,13 S… Expand
Polymorphism of artemisinin from Artemisia annua
Abstract X-ray crystallography studies have confirmed the discovery of a new polymorphic artemisinin crystal belonging to the triclinic space group, P1. The physicochemical properties of the new… Expand
Studies on Picrate. VIII. Crystal and Molecular Structures of Aromatic Amine Picrates : Aniline, N-Methylaniline, N, N-Dimethylaniline and o-, m- and p-Phenylenediamine Picrates
The crystal and molecular structures of the title compounds have been elucidated by X-ray structure analysis.All compounds are formed through ionic and hydrogen bondings in the crystal state. The… Expand
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