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Zenichi Yoshida (1925-2023)
Zenichi Yoshida (1925-2023)
Professor. Zenichi Yoshida,
a member of the Honorary Advisors of HETEROCYCLES (1975-1998),
has passed away on May 4, 2023 at the age of 97.
I deeply express my regret over his death.
Kunio Ogasawara
Editor
May 11, 2023
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Paper | Regular issue | Vol 36, No. 1, 1993, pp.79-86
Published online, 1st January, 1970■ Thiaphysovenol Phenylcarbamates: X-Ray Structures of Biologically Active and Inactive Anticholinesterase Agents
Published online, 1st January, 1970
DOI: 10.3987/COM-92-6148
■ Thiaphysovenol Phenylcarbamates: X-Ray Structures of Biologically Active and Inactive Anticholinesterase Agents
Judith L. Flippen-Anderson, Xiao-shu He, Arnold Brossi,* Nigel H. Greig, and Stanley I. Rapoport
*Laboratory of Analytical Chemistry, NIDDK, National Institute of Health, Bethesda, MD 20892, U.S.A.
Abstract
The X-ray structure of the biologically active phenylcarbamate (4), and the biologically inactive phenylcarbamate (5) of the thiaphysovenol series, reveal that the two aromatic ring systems are differently oriented towards each other. The abolute configuration of both compounds, determined by using the anomolous scattering from the sulfur atoms, was found to be (3aS-cis).
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