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.
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.
Xia
Xue-Kui
XK
School of Chemistry and Chemical Engineering, Sun Yat-sen (Zhongshan) University, Guangzhou, Guangdong, 510275, P.R. China.
Liu
Fan
F
She
Zhi-Gang
ZG
Yang
Li-Guo
LG
Li
Meng-Feng
MF
Vrijmoed
L L P
LL
Lin
Yong-Cheng
YC
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*
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