A new xanthone fromHedychium gardnerianum

Abstract

A new xanthone (2), 3-(2-hydroxyethoxy)xanthone, and three known compounds, 1-hydroxyxanthone, salicylic acid and the sesquiterpene oplopanone, were isolated for the first time from the rhizomes of Hedychium gardnerianum Rosc. The structures of these compounds were elucidated on the basis of detailed spectral analysis, including 2D NMR experiments.

On the relationships between molecular conformations and intermolecular contacts toward crystal self-assembly of mono-, di-, tri-, and tetra-oxygenated xanthone derivatives

“…The compound I was isolated from Hedychium gardnerianum [11] and the others (II, III, and IV) were afforded from Hapoclathra paniculata [12]. The previous molecular structures of I-IV were deduced from performing spectroscopic experiments reported elsewhere [11]. The purity of xanthones was of at least 97%, such as determined by high performance liquid chromatography (HPLC).…”

Bioactivity-guided isolation of anti-hepatitis B virus active sesquiterpenoids from the traditional Chinese medicine: Rhizomes of Cyperus rotundus

“…2). The known compounds 6-37 were identified as cyperenol (6) (Jacobs et al, 1987), cyperenoic acid (7) (Boonyarathanakornkit et al, 1988), cyperotundone (8) (Hikino et al, 1965(Hikino et al, , 1966, sugeonol (9) (Hikino et al, 1968a), scariodione (10) (Hikino et al, 1968a), sugetriol triacetate (11) (Xu et al, 2009), α-cyperone (12) (Naya et al, 1990), (4aS, 7S),-7-hydroxy-1, 4a-dimethyl-7-(prop-1-en-2-yl),-4, 4a, 5, 6, 7, 8-hexahydronaphthalen-2 (3H),-one (13) (Nozaki et al, 1995), (4aS, 7S, 8R),-8-hydroxy-1, 4a-dimethyl-7-(prop-1-en-2-yl), -4, 4a, 5, 6, 7, 8-hexahydronaphtha-len-2 (3H), -one (14) (Nozaki et al, 1995), cyperol (15) (Sun et al, 2000), 1β-hydroxy-α-cyperone (16) (Sanz and Marco, 1990), 10-epieudesm-11-ene-3β, 5α-diol (17) (Huffman et al, 1980), 3β-hydroxyilicic alcohol (11 (13),-eudesmene-3, 4, 12-triol) (18) (Zhang et al, 2007), cyperusol C (19) (Xu et al, 2004), α-corymbolol (20) (Nyasse et al, 1988), 3β, 4α-dihydroxy-7-epieudesm-11 (13), -ene (21) (Ahmed et al, 1998), 2-oxo-α-cyperone (22) (Murai et al, 1982), 7α (H), 10β-eudesm-4-en-3-one-11,12-diol (23) (Hikino et al, 1975), rhombitriol (24) (Rukachaisirikul et al, 2005), 7-epi-teucrenone (25) (Fraga et al, 1995), α-rotunol (26) (Hiking et al, 1971), nootkatone (27) (Gliszczyńska et al, 2011), 12-hydroxynootkatone (28) , oxyphyllol C (29) (Morikawa et al, 2002), 5-hydroxylucinone (30) (Chiu et al, 2001), oplopanone (31) (Carvalho et al, 2003), 10-hydroxyamorph-4-en-3-one (32) (Wu et al, 2007), cyperusol D (33) (Xu et al, 2004), 2-hydroxy-14-calamenenone (34) (Morimoto et al, 2009), 1-isopropyl-2, 7 dimethylnaphthalene (35) (Qin ...…”

Caesalpinone A, a new type of gorgonane sesquiterpenoid containing an unprecedented 1,15-bridge, from the pods of Caesalpinia spinosa Kuntze

“…As our continuous research on Caesalpinia plants in Yunnan Province, a new type of gorgonane sesquiterpenoid containing an unprecedented 1,15-bridge, caesalpinone A (1) (Fig. 1), together with ten known sesquiterpenoids, 9α-hydroxy-1β-ethoxycaryolanol (2) [7], clovane-2β,9α-diol (3) [8], tricyclohumuladiol (4) [9], aromadendrane-4β,10α-diol (5) [10], (+)-aphanamol I (6) [11], 10-hydroxy-6,10-epoxy-7(14)-isodaucane (7) [12], artabotrol (8) [13], 4(14)-eudesmene-6α,11-diol (9) [14], 4(15)-eudesmene-1β,6α-diol (10) [15], and oplopanone (11) [16] were isolated from the pods of this plant. The sesquiterpenoids of isodaucane skeleton (6, 7 and 8) and caryolane skeleton (2) (Fig.…”