Research Article

Active Compound Identification in Extracts of N. lappaceum Peel and Evaluation of Antioxidant Capacity

Table 5

Active compounds identified in the mass spectra of N. lappaceum peel extracts.

Compound (type)Molecular formulaTr (min)Peak area (%)Molecular weight (g·mol−1)Top peakFragment ions (m/z), 2nd and 3rd highestExtract

5-Methylfuran-2-carbaldehyde (arenecarbaldehyde)C6H6O24.10.20110.11110109 and 53Crude
1,2-Benzenediol (hydroxybenzene)C6H6O27.42.97110.1111064 and 63Crude
1,2,3-Benzenetriol or pyrogallol (catechin)C6H6O39.729.17126.1112652 and 80Crude
3-Hydroxybenzoic acid (phenolic acid)C7H6O311.37.86138.12138121 and 60Crude
Hexadecanoic acid or palmitic acid (phenolic acid)C16H32O216.01.11256.437360 and 55Crude
Hexadecanoic acid, ethyl ester (fatty acid ethyl ester)C18H36O216.40.18284.5088101 and 55Crude
Oleic acid methyl ester (fatty acid methyl ester)C19H36O217.40.18296.555182 and 73Crude
(9Z,12Z)-Octadeca-9,12-dienoic acid or linoleic acid (fatty acid)C18H32O217.70.29280.46781 and 55Crude
9-Octadecenoic acid or elaidic acid (phenolic acid)C18H34O217.81.30282.55573 and 60Crude
Beta-tocopherol or vitamin E (vitamin)C28H48O226.00.40416.7416151 and 207Crude
2,4-Di-tert-butylphenol (alkylbenzene)C14H22O11.247.78 and 9.21206.32191206 and 57LLE with hexane and ethyl acetate
Isobutyl octyl phthalateC20H30O415.2215.66 and 16.46334.4514957 and 223LLE with hexane and ethyl acetate
Hexadecanoic acid, methyl ester (fatty acid methyl ester)C17H34O215.754.02 and 2.44270.57487 and 57LLE with ethyl acetate
Hexadecanoic acid, ethyl ester (fatty acid ethyl ester)C18H36O216.3816.54 and 17.79284.588101 and 55LLE with hexane and ethyl acetate
Octadecanoic acid, methyl ester or methyl stearate (fatty acid methyl ester)C19H38O217.63.55 and 4.17298.507487 and 57LLE with hexane and ethyl acetate
Oleic acid, ethyl ester (fatty acid ethyl ester)C20H38O218.04.37 and 3.07310.516955 and 83LLE with hexane and ethyl acetate
Octadecanoic acid, ethyl ester (fatty acid ethyl ester)C20H40O218.224.30 and 25.2312.588101 and 55LLE with hexane and ethyl acetate
Diisooctyl phthalate (phthalate ester)C24H38O421.28.88 and 5.33390.6149167 and 57LLE with ethyl acetate

Tr: retention time.