Isolation of Triterpenoids from the Stem Bark of Albizia julibrissin and Their Inhibition Activity on ACAT-1 and ACAT-2

Studies on Cytotoxic Constituents from the Leaves of Elaeagnus oldhamii Maxim. in Non-Small Cell Lung Cancer A549 Cells

“…The 1 H- and 13 C-NMR spectra of the 25 compounds isolated in present study (Table 1, Table 2, Table 3 and Section 3.4) including oleanolic acid ( 1 ) [32], 3- O -( Z )-coumaroyl oleanolic acid ( 2 ) [33], 3- O -( E )-coumaroyl oleanolic acid ( 3 ) [34], 3- O -caffeoyl oleanolic acid ( 4 ) [35], ursolic acid ( 5 ) [36], 3- O -( Z )-coumaroyl ursolic acid ( 6 ) [35], 3- O -( E )-coumaroyl ursolic acid ( 7 ) [36], 3- O -caffeoyl ursolic acid ( 8 ) [37], 3β, 13β-dihydroxyolean-11-en-28-oic acid ( 9 ) [37], 3β, 13β-dihydroxyurs-11-en-28-oic acid ( 10 ) [38], uvaol ( 11 ) [39], betulin ( 12 ) [40], lupeol ( 13 ) [41], kaempferol ( 14 ) [42], aromadendrin ( 15 ) [43], epigallocatechin ( 16 ) [44], cis -tiliroside ( 17 ) [45], trans -tiliroside ( 18 ) [46], isoamericanol B ( 19 ) [47], trans - p -coumaric acid ( 20 ) [47], protocatechuic acid ( 21 ) [48], salicylic acid ( 22 ) [49], trans- ferulic acid ( 23 ) [50], syringic acid ( 24 ) [51] and 3- O -methylgallic acid ( 25 ) [52] were compared with the spectral data reported in the literature and their structures were thus confirmed.…”

Phytochemical analysis with the antioxidant and aldose reductase inhibitory capacities of Tephrosia humilis aerial parts’ extracts

“…On the basis of 1-D, 2-D NMR and UV-Vis spectral analyses, their structures were elucidated as 1,4-dihydroxy-3,4-(epoxyethano)-5-cyclohexene (1) (Hase et al 1995) and cleroindicin E (2) (Tian et al 1997) from the dichloromethane extract, lupeol (3) (Baek et al 2010), methyl p-coumarate (4) (Chaabi et al 2010) and methyl 4-hydroxybenzoate (5) (Owen C et al 2003) from the diethyl ether extract, prunin (6) (Turner et al 2005), 5,7,2ʹ,5ʹ-tetrahydroxyflavanone 7-glucoside (7) (Aquino et al 1990), protocatechuic acid (8) (Lee et al 2011), luteolin 7-glucoside (9) (Liu et al 2012) and apigenin (10) (Owen RW et al 2003) from the ethyl acetate extract; and naringin (11) Downloaded by [Cambridge University Library] at 10:24 11 August 2015 (Yoon et al 2012), rhoifolin (12) ) and luteolin 7-glucuronate (13) (Ringl et al 2007) from the n-butanol extract. Compounds 3, 4, 5, 8, 9, 10, 11 and 12 are known antioxidant agents (Van Kiem et al 2010;Moussouni et al 2011;Hugo et al 2012;Begum & Prasad 2012;Thangavel et al 2012;Santiago & Mayor 2014;Song & Park 2014;Hlila et al 2015) and may be responsible for the significant exhibited antioxidant capacity of the diethyl ether, ethyl acetate and n-butanol extracts of the plant.…”

Chemical constituents of the Stem Bark of Acacia ataxacantha (Fabaceae)

“…18 The 1 H-NMR spectrum displayed a characteristic signal of a downfield singlet at δ1.66 ascribable to the vinyl methyl proton at (C-30), and a pair of broad singlets due to exomethylene protons (H-29) at δ = 4.55 and 4.67 ppm consistent with isopropenyl side chain of lupine type triterpenoid. 19 The doublet of doublets signals at δ=3.17 in the spectrum was typical of a 3-hydroxy type triterpenoid. The proton NMR also showed seven methyl singlets at δ=0.74, 0.76, 0.81, 0.92, 0.94, 1.01 and 1.66 and a secondary hydroxyl methine at δ = 3.17.…”