✦ LIBER ✦

Untenone A, a new cyclopentenone from the Okinawan marine sponge Plakortis sp. corresponding to the dienophile in the biosynthesis of manzamenones

✍ Scribed by Masami Ishibashi; Shinji Takeuchi; Jun'ichi Kobayashi

Publisher: Elsevier Science
Year: 1993
Tongue: French
Weight: 141 KB
Volume: 34
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(00)79217-3

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✦ Synopsis

Untenone A (I). a new cyclopentenonc derivative was isolated from the Okinawan marine sponge

Plakartis sp. This compound (1) is chemically equivalent to the hypothetical dienophile in biosynthesis of mansamenones and this isolation provides a substantiation for the proposed biosynthetic process of mansamenones bwotving intermolecular [4+2] cyckmddidon reaction.

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Plakotenin, a new cytotoxic carboxylic a

Plakotenin, a new cytotoxic carboxylic acid from the okinawan marine sponge plakortis Sp.

✍ Jun'ichi Kobayashi; Shinji Takeuchi; Masami Ishibashi; Hideyuki Shigemori; Takum 📂 Article 📅 1992 🏛 Elsevier Science 🌐 French ⚖ 183 KB

Plakotenin. a new carboxylic acid with cytotoxic acrivity was isolated from the Okinawan marine sponge PIak$s sp. and the struc~vc elucidated on the basis of spectroscopic data. Marine sponges of the genus Plakortis have been a rich source of a variety of unique bioactive compounds such as polycycli