| Summary: | 碩士 === 國立成功大學 === 化學系碩博士班 === 92 === Forty compounds were isolated from the fruit body of Polyporus umbellatus and identified as ergosta-4,6,8(14),22-tetraen-3-one, ergosta-7,22-dien-3-ol, 5α,8α-epidioxyergosta-6,22-dien-3-ol, ergosta-7,22-dien-3-one, ergosterol , (17R)-methylincisterol, polyporusumbin A, ergosta-7,22t-diene-3β,5α,6β-triol, 3β,5α-dihydroxy-6β-methoxyergosta-7,22-diene, 3β,5α-dihydroxyergosta-
7,22t-dien-6-one, polyporusterone A, polyporusterone B, 4-hydroxybenzaldehyde, 4-methoxybenzoic acid, 3,4-dihydroxybenzaldehyde, methyl cis-p-coumarate, methyl p-coumarate, ferulic acid, methyl ferulate, 3-benzyl-6-methylpiperazine-2,5-dione, gancidin W, dibutyl asparate, glutamic diketopiperazine dibutyl ester, 4-aminobutyric acid butyl ester, glycine butyl ester, alanine, uracil, nicotinic acid, hypoxanthine, guanine, 5-hydroxymethylfuran-2-carboxylic acid butyl ester, 5-butoxymethylfuran-2-
carbaldehyde, 5-hydroxymethylfuran-2-carbaldehyde, 2-deoxy-3-O-methyl-
D-thero-pentano-1,4-lactone, pyrrolidin-2-one, butyl 2,3-dihydroxypropionate, sodium acetate, sodium acetylalanine, D-mannitol and succinic acid. Their structures were determined by 1H, 13C and 2D NMR and MS spectral analyses. The known compounds were also identified by comparison of their physical and spectral data with those reported in the literature. Twelve of these metabolites, namely, 3-benzyl-6-methylpiperazine-2,5-dione, dibutyl asparate, glutamic diketopiperazine dibutyl ester, glycine butyl ester, butyl 2,3-dihydroxypropionate, sodium acetylalanine, 4-aminobutyric acid butyl ester, 5-butoxymethylfuran-2-carbaldehyde, 5-hydroxymethylfuran-2-carboxylic acid butyl ester, 2-deoxy-3-O-methyl-D-thero-pentano-1,4-lactone, pyrrolidin-2-one and polyporusumbin A, were reported from natural source for the first time.
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