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[ 37 ] 4 aconitic acid 1.16 174.0164 175.0235 −1.0 [M+H] + C 6 H 6 O 6 175.1191,130.0994,116.0747, 104.0508 organic acids [ 37 ] 5 Uridine 1.18 244.0695 245.0774 2.3 [M+H] + C 9 H 12 N 2 O 6 245.1161,217.0954,142.0891,113.0371 nucleoside [ 38 ] 6 L

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Acta Chromatographica
Authors:
Omar M. Khalaf
,
Mosad A. Ghareeb
,
Amal M. Saad
,
Hassan M. F. Madkour
,
Ahmed K. El-Ziaty
, and
Mohamed S. Abdel-Aziz

, dd, J = 9.2, 2.0 Hz, H-6′), 6.87 (1H, d , J = 8.8 Hz, H-5′), 6.36 (1H, d, J = 2.0 Hz, H-8), 6.19 (1H, d, J = 2.0 Hz, H-6); sugar: δ (ppm): 5.34 (1H, d, J = 7.2 Hz, H-1″), 4.39 (1H, d, J = 2.8 Hz, H-1″′), 3.17–3.64 (9H, m, H-2″- H-6″, H-2

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H12 O6 D-(−)-Quinic acid 17 2.633 [M − H]−1 180.06339 2.17 179.056650,89.02470,75.00900,59.01400 C6 H12 O6 D-(−)-Fructose 18 2.679 [M − H]−1 174.01644 0.79 173.00958,154.99913,111.00911,85.02976 C6 H6 O6 trans-Aconitic acid 19 2.685 [M − H]−1 168

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Acta Chromatographica
Authors:
Su-su Bao
,
Jian Wen
,
Teng-hui Liu
,
Bo-wen Zhang
,
Chen-chen Wang
, and
Guo-xin Hu

edible oil. Following an oral dose of 50 mg/kg, 300 μL of blood samples was drawn from rat tail vein. Samples were obtained at 10 min, 30 min, 1 h, 2 h, 4 h, 6 h, 8 h, 10 h, 12 h, 24 h, and 36 h. Method Validation

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) from m / z 384, m / z 338 (loss of C 2 H 6 O) from m / z 384, and m / z 352 (loss of CH 4 O) from m / z 384 are visible in the MS/MS spectrum ( Fig. 6A ). The hypothesized fragmentation pathway was constructed using chemdraw software from the

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terpenoids were all obtained as white amorphous powder. Dihydrokaempferol ( 1 ): ESI–MS, m/z 311.3 [M + Na] + . 1 H-NMR (DMSO- d 6 , 400 MHz) δ : 4.58 (1H, d, J = 11.2 Hz, H-3), 5.04 (1H, d, J = 11.2 Hz, H-2), 5.86 (1H, s, H-6), 5.91 (1H, s

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4,490.3 1.89 – 6 h 4,450.8 1.82 – 24 h 4,400.1 1.94 0.19 3 days 3,410.6 5.54 5.33 7 days 3,001.3 6.88 5.45 Caffeine 30 min 6,900.5 1.75 – 6 h 6,910.2 1.85 – 24 h 6,942.2 1.66 0.115 3 days 6,805.1 3.99 7.56 7 days 6,700.9 5.34 6.22 Phenylepherine 30

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another NH proton at position 5. This suggested confirming the presence of one NH and one NH2 group in the molecule. The presence of nOe cross-correlations between H1/H10, H3/H5, H6/H16, H12/H18, and H13/H18 along with the HMBC correlations between H18/C17

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leaves. The laxative, wound healing, antioxidant, anti-inflammatory, immunostimulant, antimicrobial, antitumor, analgesic and neuroprotective effects of A. vera plant have been reported [ 3–7 ]. Allantoin is a chemical compound with formula C 4 H 6 N 4

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. Nobiletin and tangeretin were administered intravenously (iv) 1 mg kg −1 and orally (po) 5 mg kg −1 , respectively, with 6 rats in each group, for a total of 24 rats. At 0.083 3, 0.5, 1, 2, 3, 4 h, 6, 8 and 12 h time points, 0.3 mL blood was collected from

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