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Isolation of iso-grayanotoxin II from leaves of Leucothoe grayana Max. Its X-ray crystallographic analysis and acute toxicity in mice.
Terai, T; Araho, D; Osakabe, K; Katai, M; Narama, I; Matsuura, T; Katakawa, J; Tetsumi, T; Sato, M.
Chem Pharm Bull (Tokyo) ; 48(1): 142-4, 2000 Jan.
Article in English | MEDLINE | ID: mdl-10705491

ABSTRACT

The structure of iso-grayanotoxin II, a new diterpenoid from Leucothoe grayana MAX., has been determined as 3 beta,5 beta,6 beta,14 beta,16 alpha-pentahydroxygrayanotox-9(10)-ene by spectroscopic and X-ray crystallographic analysis. The lethal dosage level of iso-grayanotoxin II in mice was lower than that of grayanotoxin III.


Subject(s)
Diterpenes/chemistry , Diterpenes/toxicity , Plant Leaves/chemistry , Plants, Toxic/chemistry , Toxins, Biological/chemistry , Toxins, Biological/toxicity , Animals , Chromatography, Gas , Crystallography, X-Ray , Diterpenes/isolation & purification , Isomerism , Male , Mice , Mice, Inbred ICR , Molecular Conformation , Spectrophotometry, Infrared , Toxins, Biological/isolation & purification
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