| Sitosterol | Click on links below to highlight sections of the molecules | Sitostanol |
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Sitosterol is a plant sterol, with only a small difference from cholesterol - an extra ethyl group -C2H5. Sitostanol is a plant stanol, with only one small difference from sitosterol - a single bond rather than a double bond on one of the rings. As their names suggest, these compounds are alcohols, possessing an - OH group which can react with acids to form esters. Shown below is an ester of sitostanol - sitostanyl oleate. |
| Sitostanyl oleate is an ester formed between sitostanol and the (mono-unsaturated) fatty acid oleic acid .
An ester is a class of compound formed when an alcohol and an acid are covalently joined, with the elimination of water.
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