Four new dimeric sesquiterpenes, halichonadins M-P (1-4), and one new sesquiterpene, halichonadin Q (5), were isolated from an Okinawan marine sponge Halichondria sp. The sesquiterpenes have eudesmane skeleton in common Halichonadin M (1) is a symmetrical dimer linked to a nitrilotriacetic acid fragment through amide bonds. Halichonadin N (2) is a structurally unique dimeric sesquiterpene connected via a pyrrolidine unit, while halichonadins 0 (3) and P (4) have linker moieties consisting of a piperidine unit. Halichonadin Q (5) is a sesquiterpene possessing a pyrrolidine unit. The structures of 1-5 were elucidated by spectroscopic analysis. Halichonadin 0 (3) showed antimicrobial activity against Staphylococcus aureus, Micrococcus luteus, and Trichophyton mentagrophytes.
机构:
Western Australian Museum, Locked Bag 49, Welshpool Dc, WA 6986, AustraliaShowa Pharmaceut Univ, 3-3165 Higashi Tamagawagakuen, Machida, Tokyo 1948543, Japan
Fromont, Jane
Gonoi, Tohru
论文数: 0引用数: 0
h-index: 0
机构:
Chiba Univ, Med Mycol Res Ctr, Chiba 2600856, JapanShowa Pharmaceut Univ, 3-3165 Higashi Tamagawagakuen, Machida, Tokyo 1948543, Japan
Gonoi, Tohru
Kobayashi, Jun'ichi
论文数: 0引用数: 0
h-index: 0
机构:
Hokkaido Univ, Grad Sch Pharmaceut Sci, Sapporo, Hokkaido 0600812, JapanShowa Pharmaceut Univ, 3-3165 Higashi Tamagawagakuen, Machida, Tokyo 1948543, Japan