Chemical and Pharmaceutical Bulletin p. 492 - 499 (1996)
Update date:2022-08-03
Topics:
Yoshikawa
Yoshizumi
Murakami
Matsuda
Yamahara
Murakami
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.
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