- Medicinal foodstuffs. II. On the bioactive constituents of the tuber of Sagittaria trifolia L. (Kuwai, Alismataceae): Absolute stereostructures of trifoliones A, B, C, and D, sagittariosides a and b, and arabinothalictoside
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From the medicinal foodstuff 'kuwai', the tuber of Sagittaria trifolia L., four bioactive diterpene ketones, trifoliones A, B, C, and D, two diterpene glucosides, sagittariosides a and b, and a nitroethylphenol glycoside, arabinothalictoside, were isolated, together with six known diterpenes. Their absolute stereostructures were determined on the basis of chemical and physicochemical evidence which included the application of a modified Mosher's method and an exciton chirality method. Among the diterpene constituents, trifoliones A, B, C, and D exhibited inhibitory effects on the histamine release from rat mast cells induced by compound 48/80 and calcium ionophore A-23187.
- Yoshikawa,Yoshizumi,Murakami,Matsuda,Yamahara,Murakami
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p. 492 - 499
(2007/10/03)
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- Isolation and Structure of Thalictoside
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Thalictoside (1), a novel glycoside containing a nitro group, was isolated from Thalictrum aquilegifolium and the structure was shown to be 4-hydroxy-1-(2-nitroethyl)benzene 4-O-β-D-glucopyranoside on the basis of chemical transformations, spectral analys
- Ina, Hiroji,Iida, Hideo
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p. 726 - 729
(2007/10/02)
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- UN NOUVEL HETEROSIDE NITRE EXTRAIT D'ANNONA SQUAMOSA
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A new glycoside was isolated from a 60percent methanol extract of dried leaves and stems of Annona squamosa.Its chemical structure was determined as 4-(-2-nitroethyl)-1-benzene.Key Word Index -- Annona squamosa; Annonaceae; primeveroside; 4-(-2-nitroethyl)phenol; 4-(-2-aminoethyl)phenol; tyramine.
- Forgacs, P.,Desconclois, J. F.,Provost, J.,Tiberghien, R.,Touche, A.
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p. 1251 - 1252
(2007/10/02)
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