Structural elucidation and NMR assignments of four aromatic lactones from a mangrove endophytic fungus (No. GX4-1B).
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.
Huang
Hongbo
H
School of Chemistry and Chemical Engineering, Sun Yat-Sen (Zhongshan) University, Guangzhou, 510275, PR China.
Li
Qing
Q
Feng
Xiaojun
X
Chen
Bin
B
Wang
Jun
J
Liu
Lan
L
She
Zhigang
Z
Lin
Yongcheng
Y
D005658:Fungi / Q000737:chemistry*; D006841:Hydrocarbons, Aromatic / Q000737:chemistry*; D007783:Lactones / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D043982:Rhizophoraceae / Q000382:microbiology*
D006841:Hydrocarbons, Aromatic; D007783:Lactones