Aculeaquamides B and C, two new paraherquamides from the co-culture of Aspergillus aculeatinus WHUF0198 and Penicillium sp. DM27

Abstract

Two new paraherquamides (PHQs) namely aculeaquamides B and C (1 and 2), along with four known PHQs (3-6), were isolated from the co-culture of marine fungus Aspergillus aculeatinus WHUF0198 and mangrove-associated fungus Penicillium sp. DM27. Compound 1 represents the first PHQ derivative featuring an uncommon 7/6/5/5/6/5 hexacyclic system. The structures of the isolated compounds were elucidated based on exhaustive NMR spectroscopy measurement and HRESIMS data. The absolute configurations of new compounds were determined by TDDFT-ECD calculations. Compound 3 demonstrated suppression of AngII-induced cardiac hypertrophy while exhibiting relatively low cardiomyocyte toxicity.

Keywords: Aspergillus aculeatinus; Cardiac hypertrophy; Mangrove fungus; Marine fungus; Paraherquamides; Penicillium sp..