Phytochemistry p. 2835 - 2838 (1984)
Update date:2022-08-04
Topics:
Raederstorff, Daniel
Rohmer, Michel
Key Word Index-Nematochrysopsis roscoffensis; Chrysotila lamellosa; Chrysophyceae; Prymnesiophyceae; unicellular algae; sterols; (24E)-24-n-propylidenecholesterol; 24-n-propylcholesterol.Two rare C30-sterols, (24E)-24-n-propylidenecholest-5-en-3β-ol and 24-n-propylcholest-5-en-3β-ol, and (24S)-24-ethylcholesta-5,22-dien-3β-ol (stigmasterol) are the major sterols of Nematochrysopsis roscoffensis, a Chrysophyte of the Sarcinochrysidales order.This unique sterol composition is different from the sterol contents of other Chrysophytes and justifies the peculiar position of the Sarcinochrysidales, which are by some characteristics morphologically and biologically related to the Phaeophyceae.The presence of (24S)-24-methylcholesta-5,22-dien-3β-ol (24-epibrassicasterol) as a major sterol in Chrysotila lamellosa is in accordance with the few previous results obtained from other Prymnesiophyceae, although the presence of the other major sterol, (24R)-24-ethylcholesta-5,22-dien-3β-ol (poriferasterol), has never been reported in these algae.
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