title: Structural elucidation and NMR assignments of four aromatic lactones from a mangrove endophytic fungus (No. GX4-1B).
abstract: Two new aromatic lactones, 6-hydroxy-4-hydroxymethyl-8-methoxy-3- methylisocoumarin (1) and 1,10-dihydroxy-8-methyl-dibenz[b, e]oxepin-6,11-dione (2), together with two known compounds, 1,10-dihydroxy-dibenz[b, e]oxepin-6,11-dione (3) and 3-hydroxymethyl-6,8-dimethoxycoumarin (4), were isolated from a mangrove endophytic fungus (No. GX4-1B) collected from the South China Sea. Their structures were elucidated and the data of (1)H and (13)C NMR were assigned completely by HREIMS, 1D and 2D NMR experiments including HMQC, HMBC and NOESY.
authors.affiliation: School of Chemistry and Chemical Engineering, Sun Yat-Sen (Zhongshan) University, Guangzhou, 510275, PR China.
authors.forename: Hongbo
authors.initials: H
authors.lastname: Huang
authors.forename: Qing
authors.initials: Q
authors.lastname: Li
authors.forename: Xiaojun
authors.initials: X
authors.lastname: Feng
authors.forename: Bin
authors.initials: B
authors.lastname: Chen
authors.forename: Jun
authors.initials: J
authors.lastname: Wang
authors.forename: Lan
authors.initials: L
authors.lastname: Liu
authors.forename: Zhigang
authors.initials: Z
authors.lastname: She
authors.forename: Yongcheng
authors.initials: Y
authors.lastname: Lin
mesh_terms: D005658:Fungi / Q000737:chemistry*; D006841:Hydrocarbons, Aromatic / Q000737:chemistry*; D007783:Lactones / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D043982:Rhizophoraceae / Q000382:microbiology*
chemical_list: D006841:Hydrocarbons, Aromatic; D007783:Lactones