Nocapyrones: α- and γ-pyrones from a marine-derived Nocardiopsis sp.

One new α-pyrone (nocapyrone R (1)), and three known γ-pyrones (nocapyrones B, H and L (2-4)) were isolated from the culture extract of a Nocardiopsis strain collected from marine sediment. Structures of these compounds were determined on the basis of spectroscopic data including NMR and MS. γ-Pyrones 2-4 were found to induce adiponectin production in murine ST-13 preadipocyte cells but the α-pyrone 1 had no activity. The absolute configuration of the anteiso-methyl branching in 4 was determined by HPLC comparison of a degraded product of 4 with standard samples as a 2:3 enantiomeric mixture of (R)- and (S)-isomers.

Citation

Youngju Kim, Hiromu Ogura, Kazuaki Akasaka, Tsutomu Oikawa, Nobuyasu Matsuura, Chiaki Imada, Hisato Yasuda, Yasuhiro Igarashi. Nocapyrones: α- and γ-pyrones from a marine-derived Nocardiopsis sp. Marine drugs. 2014 Jul 08;12(7):4110-25

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PMID: 25007160

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