title: Three new xanthone derivatives from an algicolous isolate of Aspergillus wentii.
abstract: Three new xanthone derivatives, yicathin A (1), yicathin B (2), and yicathin C (3), and three known anthraquinone derivatives, alatinone (4), 1,5-dihydroxy-3-methoxy-7-methylanthraquinone (5), and 5-hydroxy-1,3-dimethoxy-7-methylanthraquinone (6), were isolated from the cultures of Aspergillus wentii pt-1, an endophytic fungus isolated from the marine red alga Gymnogongrus flabelliformis. Their structures were unambiguously elucidated by NMR and mass spectroscopic methods as well as quantum chemical calculations. Compound 2 was active against Escherichia coli, and 3 could inhibit E. coli, Staphylococcus aureus, and Colletotrichum lagenarium.
authors.forename: Ran-Ran
authors.initials: RR
authors.lastname: Sun
authors.forename: Feng-Ping
authors.initials: FP
authors.lastname: Miao
authors.forename: Jing
authors.initials: J
authors.lastname: Zhang
authors.forename: Gang
authors.initials: G
authors.lastname: Wang
authors.forename: Xiu-Li
authors.initials: XL
authors.lastname: Yin
authors.forename: Nai-Yun
authors.initials: NY
authors.lastname: Ji
mesh_terms: D001230:Aspergillus / Q000378:metabolism*; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D017550:Spectroscopy, Fourier Transform Infrared; D044004:Xanthones / Q000302:isolation & purification* / Q000378:metabolism
chemical_list: D044004:Xanthones