title: 1H and 13C NMR assignments for 6-demethylvermistatin and two penicillide derivatives from the mangrove fungus Guignardia sp. (No. 4382) from the South China Sea.
abstract: One new compound 6-demethylvermistatin (1), together with two known compounds, the penicillide derivatives (2) and (3) were isolated from the mangrove fungus Guignardia sp. No. 4382 obtained from the South China Sea. Their structures were assigned using high-resolution electron ionization mass spectrometry(HREIMS), (1)H and (13)C NMR spectra, DEPT, and by 2D COSY, HMQC, and HMBC experiments. The absolute configuration of 1 was established by comparison of its CD with that of vermistatin.
authors.affiliation: School of Chemistry and Chemical Engineering, Sun Yat-sen (Zhongshan) University, Guangzhou, Guangdong, 510275, P.R. China.
authors.forename: Xue-Kui
authors.initials: XK
authors.lastname: Xia
authors.forename: Fan
authors.initials: F
authors.lastname: Liu
authors.forename: Zhi-Gang
authors.initials: ZG
authors.lastname: She
authors.forename: Li-Guo
authors.initials: LG
authors.lastname: Yang
authors.forename: Meng-Feng
authors.initials: MF
authors.lastname: Li
authors.forename: L L P
authors.initials: LL
authors.lastname: Vrijmoed
authors.forename: Yong-Cheng
authors.initials: YC
authors.lastname: Lin
mesh_terms: D001203:Ascomycota / Q000737:chemistry* / Q000254:growth & development; D002247:Carbon Isotopes; D002681:China; D006575:Heterocyclic Compounds, 3-Ring / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D009792:Oceans and Seas; D024301:Plant Bark / Q000737:chemistry; D011522:Protons; D011753:Pyrones / Q000737:chemistry / Q000302:isolation & purification*; D043982:Rhizophoraceae / Q000382:microbiology*
chemical_list: C530418:(E)-3-(3-methylbut-1-enyl)-11-hydroxy-4-methoxy-9-methyl-7H-dibenzo(b,g)(1,5)dioxocin-5-one; C530417:6-demethylvermistatin; D002247:Carbon Isotopes; D006575:Heterocyclic Compounds, 3-Ring; D011522:Protons; D011753:Pyrones; C068086:purpactin A