Two new components, (24R)-6 beta-hydroxy-24-ethyl-cholest-4-en-3-one a
nd phytyl-3,7,11,15-tetramethyl-2-hexadecanenate were isolated from th
e whole plants of aquatic fern Azolla nilotica. Their structures were
established by spectroscopic techniques and chemical-correlation. Some
typical triterpenoids of ferns were also detected. (C) 1998 Elsevier
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