The Constituents of Lindera Glauca

Abstract

Twenty‐eight compounds including seven alkaloids, (+)‐3‐chloro‐N‐formylnornantenine (1), (+)‐N‐formylnornantenine (2), (+)‐boldine (3), (+)‐norboldine (4), (‐)‐norboldine (5), lycicamine (6), and tetrahydroberberine (7); four flavonoids, kaempferol (8), kaempferol‐3‐O‐arabinoside (9), quercetin (10), and quercetin‐3‐O‐rhamnoside (11); one butanolide, akolactone A (12); one p‐quinone, 2,6‐dimethoxy‐p‐quinone (13); one cyclohex‐2‐en‐1‐one, blumenol A (14); six benzenoids, methylparaben (15), p‐hydroxybenzoic acid (16), vanillic acid (17), syringic acid (18), 3,4,5‐trimethoxybenzoic acid (19), and 3‐(3,4‐dihydroxyphenyl) propionic acid (20); one diterpene, phytol (21); one triterpene, squalene (22); six steroids, (3‐sitosterol (23), β‐sitostenone (24), stigmasta‐4,22‐dien‐3‐one (25), 6β‐hydroxy‐β‐sitostenone (26), 6β‐hydroxystigmasterone (27), and β‐sitosteryl‐D‐glucoside (28) were isolated from the aerial part of Lindera glauca. These compounds were characterized and identified by physical and spectral method. All compounds were isolated for the first time from this plant. Among them, (+)‐3‐chloro‐N‐formylnornantenine (1) is a new one.

Cytotoxic and Anti-HIV Principles from the Rhizomes of Begonia nantoensis

“…The X-Ray Structure of Cucurbitacin E (6) (3 : 1) mixture as eluent to give nantoamide (2, 9 mg), oleanoic acid (1 mg), 11) (Ϫ)-auranamide (9, 7 mg), 12) glyceryl-1-tetracosanoate (6 mg), 13) lutein (3 mg), 14) methyl vanillate (2 mg), 9) vanillin (4 mg), 15) and eudesmic acid (3 mg). 16) Fractions 6 and 7 were chromatographed on silica gel column with CHCl 3 -MeOH (19 : 1) eluent to give 9-hydroxylinoleic acid (8 mg) 17) and a mixture of b-sitosteryl-b-D-glucoside (2.5 g).…”

“…Its molecular formula was determined to be C 16 Methyl (S)-glycerate (3), colorless oil, had the molecular formula C 4 H 8 O 4 from its high resolution EI-MS. In the 1 H-NMR spectrum, two diastereotopic methylene protons at d 3.84 (1H, dd, Jϭ9.9, 3.4 Hz, H-3a) and 3.91 (1H, dd, Jϭ9.9, 3.4 Hz, H-3b) coupled with a methine proton at d 4.28 (1H, t, Jϭ3.4 Hz, H-2) inferred the partial structure HOCH 2 CH(OH)-.…”

Acanthoic acid and other constituents from the stem of Annona amazonica (Annonaceae)

“…On the other hand, cassythicine (3) is more commonly found in species of Lauraceae, a family phylogenetically close to the Annonaceae, particularly in the genera Cassytha, Laurus, Litsea, Stephania, and Neolitsea; however, it is also found in some species of the genus Annona, such as A. glabra. [37][38][39][40]43 Additionally, the neutral fraction of the CH 2 Cl 2 extract yielded acanthoic acid (1), 17 three methyl esters of fatty acids 4, 5, and 6, 4,36 one sesquiterpene 7, 44 a mixture of the steroids 8 and 9, 45 and one monounsaturated fatty acid 10, 36 described for the first time in this species. They were characterized on the basis of chromatographic and spectroscopic methods, such as GC-MS, IR, ESI-MS, and NMR (1D and 2D), and comparison with data from the literature.…”

Validated high-performance liquid chromatographic method for the standardisation of Ptychopetalum olacoides Benth., Olacaceae, commercial extracts

“…The structures of the three common compounds were determined by NMR analysis and confirmed by comparison with spectral data available in the literature (Chang et al, 2000;Choi et al, 2005;Dogasaki et al, 2002). The components were identified as vanillic acid (1), protocatechuic acid (2) and theobromine (3), and their spectral details are shown below.…”