Research Article

Chemical Composition and Antioxidant Activity of Aloe vera from the Pica Oasis (Tarapacá, Chile) by UHPLC-Q/Orbitrap/MS/MS

Table 1

Tentative identification of phenolic compounds in peel, flower, gel, and root of A. vera from Tarapaca Region detected by UHPLC-Q-OT-MS.

Peak no.Tentative identificationElemental composition [M-H]Retention time (min)Theoretical mass (m/z)Measured mass (m/z)Error (ppm)Other ions (m/z)Classification of the compound

1Aloesin or aloeresin BC19H21O99.23393.11911393.11917−0.15263203.07106 (C12H11O3)
245.08168 (C14H13O4)
Chromone (C-glycosylated chromone)
2Chlorogenic acidC16H17O99.54353.08781353.087520.82133191.05534 (C7H11O6)Cinnamic acid
3Caffeic acidC9H7O49.92179.03498179.034641.89907135.04451 (C8H7O2)Cinnamic acid
4Aloe emodin-diglucosideC27H29O159.98593.15119593.150630.94411Anthracene compound (anthrone)
5IsoquercitrinC21H19O129.98463.08820463.087521.46840301.55185 (M-glucose)Flavonoid (O-glycosylated flavonoid)
6Kaempferol-3-O-hexosyl-O-pentosideC26H27O1510.29579.13554579.135130.70795Flavonoid (O-glycosylated flavonoid)
76-Methyl-1,3,8-trihydroxyanthraquinone (emodin)C15H9O510.40269.04555269.045380.63186225.05438 (C14H9O3)
241.73468
Anthracene compound (anthrone)
8Luteolin-8-C-glucoside (orientin)C21H19O1110.41447.09329447.092930.80520327.05048 (C17H11O7)
299.05582 (C16H11O6)
Flavonoid (C-glycosylated flavonoid)
9Feruloylquinic acidC17H19O910.46367.10346367.103091.00789191.05547 (C7H11O6)Cinnamic acid
1010-Hydroxyaloin AC21H21O1010.90433.11402433.113920.23089270.05280 (C15H10O5)Anthracene compound (anthrone)
11IsovitexinC21H19O1010.80431.09837431.098330.09279311.05588 (C17H11O6)
283.06058 (C16H11O5)
Flavonoid (C-glycosylated flavonoid)
12Chrysoeriol-7-O-glucuronideC22H19O1211.11475.08820475.08856−0.75775Flavonoid (O-glycosylated flavonoid)
13Caffeoyl ester of aloesinC29H29O1211.74569.16645569.166260.33382Chromone
14Aloin AC21H21O912.18417.11911417.119080.07192297.07687 (C17H13O5)
268.07318 (C16H12O4)
Anthracene compound (anthrone)
15Isoaloeresin DC29H31O1111.85555.18719555.186770.75650Chromone
162′-p-Methoxycoumaroylaloeresin BC29H29O1112.29553.17154553.170412.04277Anthracene compound (anthrone)
174,5-Dimethyl ether of Aloe emodinC17H13O512.29297.07685297.076690.53858Anthracene compound (anthrone)
18Aloin BC21H21O912.36417.11911417.118930.43153297.07669 (C17H13O5)
268.07419 (C16H12O4)
Anthracene compound (anthrone)
196′-MalonylnataloinC24H23O1212.69503.11950503.119110.77516459.12842 (C23H23O10)Anthracene compound (C-glycosylated anthrone)
20Naringenin-4′-methoxy-7-O-glucuronideC22H21O1014.39445.11402445.114010.02247Flavonoid
217-Methylether of 2′-feruloylaloesinC30H31O1213.40583.18210583.181461.09743Chromone
22Aloe emodin-8-O-glucosideC21H19O1014.52431.09837431.097931.02065269.04495 (C15H9O5)Anthracene compound (anthrone)
235,3′-Dihydroxy-6,7,4′-trimethoxyflavone (eupatorin)C18H15O714.81343.08233343.082310.05830Flavonoid
24Trihydroxy octadecenoic acidC18H33O518.28329.23335329.233280.21262Oxilipin
253,4-Di-O-caffeoylquinic acidC25H23O1219.04515.11950515.118471.99954Cinnamic acid