Aromatic polyketide glycosides from an entomopathogenic fungus, Cordyceps indigotica

A new aromatic polyketide glycoside, indigotide A (1), was isolated from the culture broth of the entomopathogenic fungus, Cordyceps indigotica, along with known cyclic depsipeptides, destruxins A, A2, B, B2 and E (3–7), and a polyketide, NG-393 (8). Repeated treatment of the C. indigotica culture broth with 5-azacytidine, a DNA methyltransferase inhibitor, led to the isolation of another new aromatic polyketide glycoside, indigotide B (2).