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Revised structure of caespitenone isolated from the liverwort Porella caespitans var. setigera and Porella swartziana

✍ Scribed by Motoo Tori; Katsuyuki Nakashima; Masao Toyota; Yoshinori Asakawa

Publisher: Elsevier Science
Year: 1993
Tongue: French
Weight: 162 KB
Volume: 34
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(00)79218-5

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✦ Synopsis

Keywards: cacspitenone, africanetype sesquiterpene, liverwon, Porellu cacspitans var. serigera Porella swurtziana Absrmet:. Caespitenone. previously isolated from the liverwort P. caespitans, has also been found in the close species P. smarrziana collected in Colombia and its st~ctmt revised to have an africane-type based on the extensive 2D NMR analyses. The absolute configuration has been assigned by chemical transformations and ally1 benzoate rule.

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Absbue. Secoswartxianins A and B. have been found in P. swarfzia~ collected in Colombig and their armmes dtmmimd to be 3.4-secoafrimt aesquitapenes based on the extensive 2D NMR analyses and chemical mm. We have been investigating the chemical constituents of liverworts from those collected not onl