Two new sesquiterpenes, chloranthalactone A ( I ) and B (11) were isolated from Chlorantkus gZaber Makino and characterized.We reported previously on t h e isolation of (-)-dihydropyrocurzerenone and on t h e detection of i t s four related compounds by gas chromatography-mass spectrometry from roots of Chloranthus s e r r a t u s Roem.e t Schult.( Japanese name : Futarishizuka ) .I Now we want t o report on plane s t r u c t u r e s ( I and I1 ) of two new sesquiterpene lactones, named chloranthalactone A and 6, from roots of C. gZaber
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Nozoe et al. (1978) studied this question.