New insecticidal cyclodepsipeptides from the fungus Isaria felina. II. Structure elucidation of isariins B, C and D.
Isariins B, C and D, isolated from a strain of Isaria felina, were shown to be cyclodepsipeptides constituted by a pentapeptide cyclized through a beta-hydroxyacid. The nature of the latter and the sequence of the peptide were determined for each compound. Relations between insecticidal activity and structure of the depsipeptides were pointed out.
D000596:Amino Acids / Q000032:analysis; D055598:Chemical Phenomena; D002621:Chemistry; D007306:Insecticides / Q000032:analysis*; D013058:Mass Spectrometry; D003904:Mitosporic Fungi / Q000032:analysis*; D010455:Peptides / Q000032:analysis*
D000596:Amino Acids; D007306:Insecticides; D010455:Peptides; C032954:isariin