Prenylated phenylbutyrolactones from cultures of a marine sponge-associated fungus Aspergillus flavipes KUFA1152.
Four undescribed prenylated phenylbutyrolactones, aspulvinones R, S, T and U, were isolated together with the previously reported aspulvinones A, B', H and 4-hydroxy-3,5-bis(3-methylbut-2-en-1-yl)benzaldehyde, from cultures of the marine sponge-derived fungus Aspergillus flavipes KUFA1152. The structures of the undescribed compounds were established on the basis of extensive analysis of 1D and 2D NMR and HRMS spectra. In the case of aspulvinone T, the absolute configuration of its stereogenic carbon was established by comparison of the experimental and calculated electronic circular dichroism (ECD) spectra. The structure of the previously reported compounds were elucidated by 1D and 2D NMR analysis as well as comparison of their 1H or/and 13C NMR data with those reported in the literature. Aspulvinones B', H, R, S, T and a mixture of aspulvinones A and U exhibited antibacterial activity against reference strains and multidrug-resistant isolates from the environment as well as capacity to inhibit biofilm formation in the reference strains. However, none of the tested compounds showed potential synergy with clinically relevant antibiotics on multidrug-resistant isolates.
['Machado|Fátima P|FP|', 'Kumla|Decha|D|', 'Pereira|José A|JA|', 'Sousa|Emilia|E|', 'Dethoup|Tida|T|', 'Freitas-Silva|Joana|J|', 'Costa|Paulo M|PM|', 'Mistry|Sharad|S|', 'Silva|Artur M S|AMS|', 'Kijjoa|Anake|A|']
D000818:Animals D000900:Anti-Bacterial Agents D001230:Aspergillus D005658:Fungi D015394:Molecular Structure D011161:Porifera
Prenylated phenylbutyrolactones Marine sponge-associated fungus Aspergillus flavipes KUFA1152 Aspulvinones Antibacterial activity Antibiofilm activity Mycale sp. Trichocomaceae