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A Pair of Novel Heptentriol Stereoisomers from the Ascomycete Daldinia concentrica
Author(s) -
Wang Fei,
Liu JiKai
Publication year - 2004
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.200490193
Subject(s) - chemistry , stereochemistry , proline , amino acid , biochemistry
A pair of novel heptentriol stereoisomers, hept‐6‐ene‐2,4,5‐triols 2 and 3 , were isolated from the culture broth of the ascomycete Daldinia concentrica ( Bolton : Fries ) Cesati & De Notaris , besides three known compounds, i.e. , 2,3‐dihydro‐5‐hydroxy‐2‐methyl‐4 H ‐1‐benzopyran‐4‐one ( 1 ), 3,5‐dihydroxy‐2‐(1‐oxobutyl)‐cyclohex‐2‐en‐1‐one ( 4 ), and pyroglutamic acid (=5‐oxo‐ L ‐proline; 5 ). Their structures were determined by spectroscopic means, including 2D‐NMR (HMQC, HMBC, 1 H, 1 H‐COSY).