Identification of (3S,9R)- and(3S,9S)-Megastigma-6,7-dien-3,5,9-triol 9-O-β-D-glucopyranosides as Damascenone Progenitors in the Flowers of Rosa damascena Mill

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  • Identification of (3S,9R)- and (3S,9S)-Megastigma-6,7-dien-3,5,9-triol 9-O-.BETA.-D-glucopyranosides as Damascenone Progenitors in the Flowers of Rosa damascena Mill.
  • Identification of 3S 9R and 3S 9S Megastigma 6 7 dien 3 5 9 triol 9 O ベータ D glucopyranosides as Damascenone Progenitors in the Flowers of Rosa damascena Mill
  • Identification of (3<i>S</i>, 9<i>R</i>)- and (3<i>S</i>, 9<i>S</i>)-Megastigma-6,7-dien-3,5,9-triol 9-<i>O</i>-β-<scp>D</scp>-glucopyranosides as Damascenone Progenitors in the…

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  The progenitors of damascenone (1), the most intensive C13-norisoprenoid volatile aroma constituent of rose essential oil, were surveyed in the flowers of Rosa damascena Mill. Besides 9-O-β-D-glucopyranosyl-3-hydroxy-7,8-didehydro-β-ionol (4b), a stable progenitor already isolated from the residual water after steam distillation of flowers of R. damascena Mill., two labile progenitors were identified to be (3S, 9R)- and (3S, 9S)-megastigma-6,7-dien-3,5,9-triol 9-O-β-D-glucopyranosides (2b) based on their synthesis and HPLC-MS analytical data. Compound 2b gave damascenone (1), 3-hydroxy-β-damascone (3) and 4b upon heating under acidic conditions.<br>

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