New asymmetrical bispyrrolidinoindoline diketopiperazines from the marine fungus Aspergillus sp. DX4H

New asymmetrical bispyrrolidinoindoline diketopiperazines from the marine fungus <i>Aspergillus</i> sp. DX4H Isolation and structure determination of a new diketopiperazine dimer from marine-derived fungus <i>Aspergillus</i> sp. SF-5280 A new diketopiperazine heterodimer from an endophytic fungus <i>Aspergillus niger</i> 1'-(2-Phenyl-ethylene)-ditryptophenaline, a New Dimeric Diketopiperazine from Aspergillus flavus 1'-(2-Phenyl-ethylene)-ditryptophenaline, a New Dimeric Diketopiperazine from Aspergillus flavus Aspergilazine A, a diketopiperazine dimer with a rare N-1 to C-6 linkage, from a marine-derived fungus Aspergillus taichungensis Protuboxepins A and B and Protubonines A and B from the Marine-Derived Fungus <i>Aspergillus</i> sp. SF-5044 2,5‐Diketopiperazines from the Marine‐Derived Fungus <i>Aspergillus fumigatus</i> YK‐7 Protuboxepins A and B and Protubonines A and B from the Marine-Derived Fungus Aspergillus sp. SF-5044 Indole diketopiperazine alkaloids from the deep-sea-derived fungus Aspergillus sp. FS445