Drychampones A–C: Three Meroterpenoids from Dryopteris championii
journal contributionposted on 01.09.2016, 00:00 by Neng-Hua Chen, Yu-Bo Zhang, Xiao-Jun Huang, Lin Jiang, Si-Qi Jiang, Guo-Qiang Li, Yao-Lan Li, Guo-Cai Wang
Three novel sesquiterpenoid-based meroterpenoids, drychampones A–C (1–3, respectively), were isolated from Dryopteris championii. Compounds 1 and 3 possessed a novel carbon skeleton which was constructed by an 11/6/6 ring system coupled with a pyronone moiety, and 1–3 were three racemates. Their structures and absolute configurations were elucidated by NMR, MS, and computational methods. The hypothetical biosynthetic pathways of these meroterpenoids and their antibacterial activities were also discussed.