Lyngbyaureidamides A and B, two anabaenopeptins from the cultured freshwater cyanobacterium Lyngbya sp. (SAG 36.91)

► Anabaenopeptin-type peptides named lyngbyaureidamides A and B are reported. ► The exocylic amino acids in lyngbyaureidamides have the D-configuration. ► Separating the two previously reported peptides, lyngbyazothrins C and D, was achieved. ► Lyngbyazothrins C and D inhibit the 20S proteasome.