Constituents fromLimonia Crenulata

Abstract

A new indole alkaloid, crenulatine (1), along with twenty known compounds, was isolated from the stems of Limonia Crenulata. Their structures were identified by spectral means. Those compounds include four alkaloids, four coumarins, two flavanones, three tetranortriterpenoids, one triterpenoid, three steroids, two lignans and two aromatic compounds.

Antioxidant and anti-inflammatory activity of constituents isolated from Dendrobium nobile (Lindl.)

“…By comparing NMR data with the previous report, the structures of isolated compounds ( 3 – 5 , 9 – 19 ) were identified as: α -tocopherolquinone ( 3 ) ( Yan et al, 2015 ), 2-(3,15-dihydroxy-3,7,11,15-tetramethylhexadecyl)-3,5,6-trimethyl-2,5-cyclohexadiene-1,4-dione ( 4 ) ( Yan et al, 2015 ), dl- α -tocopherol ( 5 ) ( Ghelf et al, 2019 ), mascatilin ( 9 ) ( Majumder and Sen, 1987 ), stigmast-4-ene-3, 6-dione ( 10 ) ( Shen et al, 2002 ), (3 β ,5 α ,20 R ,24 R )-ster-7-en-3-ol ( 11 ) ( Jaha et al, 1995 ), stigmast-4-en-6 β -ol-3-one ( 12 ) ( Niu et al, 2001 ), 7-keto- β -sitosterol ( 13 ) ( Yu et al, 2007 ), 2, 2′-oxybis (1, 4)-di-tert-butylbenze ( 14 ) ( Cao et al, 2020 ), 3-(4′-formylphenoxy)-4-methoxybenzaldehy-de ( 15 ) ( Cao et al, 2020 ), (+)-syringaresinol ( 16 ) ( Wang et al, 2009 ), 1,2-di-O-9Z-octadecenoyl-sn-glycero-3-phosphorylcholine ( 17 ) ( Kwon et al, 2003 ), methyl 2-nonanoate-3-undecanoate-cyclohexyl-1,4-diene ester ( 18 ) ( Li and Xu, 2018 ), eqi-α-amyrin ( 19 ) ( Albert and Duilio, 2005 ).…”

Sesquiterpenes and lignans from the flower buds of Daphne genkwa and their nitric oxide inhibitory activities

“…By comparison of their observed and reported NMR data, the known compounds 215 were identified as oleodaphnal (2) (Taninaka et al 1999), (4S,5R,7S)-4,11-dihydroxy-guaia-1(2), 9(10)-dien (3) (Li et al 2016), threoguaiacylglycerol--O-4-coniferyl (4) (Cutillo et al 2003), longifloroside B (5) (Wang et al 2009), threo-3,3′-dimethoxy-4,8′-oxyneoligna-9,4′,7′,9′-tetraol-7(8)-ene (6) (Wang et al 2009), ()-nortrachelogenin (7) (Zhang et al 2013), ()-Matairesin (8) (Youssef and Frahm 1995), (+)-isolariciresinol (9) (Jutiviboonsuk et al 2006), ()-secoisolariciresinol(10) (Hong et al 2006), lariciresinol (11) (Subbaraju et al 1991), ()-justiciresinol (12), syringaresinol (13) (Niu et al 2001), medioresinol (14) (Li et al 2008), and pinoresinol (15) (Páska et al 2002). All compounds were evaluated for their inhibitory effects on the NO production in LPS-induced BV-2 microglial cells using the Griess assay.…”

Cytotoxic Terpenoids from the Roots of Dracocephalum taliense

“…Twelve known diterpenoids, including sugiol ( 3 ) [ 23 ], abieta-8,11,13-triene ( 4 ) [ 25 ], dehydroabietane ( 5 ) [ 26 ], ferruginol ( 6 ) [ 27 ], cryptojapanol ( 7 ) [ 28 ], inuroyleanol ( 8 ) [ 22 ], callitrisic acid ( 9 ) [ 29 ], 11,14-dihydroxy-12,19-dimethoxy-7- oxo -8,11,13-abietatrien-19,20-olide ( 10 ) [ 30 ], totarol ( 11 ) [ 31 ], 7α-hydroxytotarol ( 12 ) [ 32 ], sempervirol ( 13 ) [ 33 ], and cyclocoulterone ( 14 ) [ 16 ], and three steroids, including (22 E )-ergosta-6,9,22-triene-3β,5β,8α-triol ( 15 ) [ 34 ], (22 E )-ergosta-6,22-diene-3β,5β,8α-triol ( 16 ) [ 34 ], and stigmast-4-en-6β-ol-3-one ( 17 ) [ 35 ], were also isolated and identified by comparison of their spectroscopic data with the literature.…”