title: Cycloaspeptides F and G, Cyclic Pentapeptides from a Cordyceps-colonizing isolate of Isaria farinosa.
abstract: Cycloaspeptides F (1) and G (2), two new cyclic pentapeptides, and the known cycloaspeptides A (3), C (4), and bisdethiodi(methylthio)hyalodendrin (5) have been isolated from the crude extract of the fungus Isaria farinosa that colonizes Cordyceps sinensis. The structures of 1 and 2 were elucidated primarily by NMR and MS methods. The absolute configuration of 1 was assigned using Marfey's method on its acid hydrolysate. Compounds 1 and 2 showed cytotoxic effects against HeLa and MCF7 cell lines, displaying the same magnitude of activity toward the MCF7 cells as the positive control 5-fluorouracil.
authors: Institute of Microbiology, Chinese Academy of Sciences, Beijing 100190, People's Republic of China.
authors: Yonggang
authors: Y
authors: Zhang
authors: Shunchun
authors: S
authors: Liu
authors: Hongwei
authors: H
authors: Liu
authors: Xingzhong
authors: X
authors: Liu
authors: Yongsheng
authors: Y
authors: Che
mesh_terms: D000970:Antineoplastic Agents / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D032661:Cordyceps / Q000737:chemistry; D004354:Drug Screening Assays, Antitumor; D006367:HeLa Cells; D006801:Humans; D006999:Hypocreales / Q000737:chemistry*; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D010456:Peptides, Cyclic / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D018609:Tibet
chemical_list: D000970:Antineoplastic Agents; D010456:Peptides, Cyclic; C544049:cycloaspeptide F; C544050:cycloaspeptide G