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. 2020 Dec 21;21(24):9762. doi: 10.3390/ijms21249762

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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GC-FID chromatograms of the fraction of triterpenoid acids obtained from chloroform extracts of cuticular waxes of rugosa rose fruit harvested in three developmental stages (young rose hips in June, unripen full-size hips in August and ripened hips in September). Peaks of identified acids are numbered according to growing retention time: 1—olean-2,12-dien-28-oic acid, 2—ursa-2,12-dien-28-oic acid, 3—3-oxo-olean-12-en-28-oic acid, 4—oleanolic acid, 5—betulinic acid, 6—3-oxo-urs-12-en-28-oic acid, 7—ursolic acid, 8—maslinic acid, 9—corosolic acid, 10—pomolic acid (analyzed in the form of methyl esters). Peaks not numbered were associated with aliphatic compounds (e.g., methylated fatty acids).