1,721,008 research outputs found
The occurrence of nor-dihydrofluorocurarine in Strychnos Amazonica Kruk. and Strychnos Froesii Ducke
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Studies on the PR toxin of Penicillium roqueforti
No full textA mycotoxin, confirmed by chemical, physical and spectroscopic data as the PR toxin described by Ru-Dong Wei and coll. (15) has been isolated from culture filtrates of Penicillium roqueforti Thom. Factors affecting the toxin and mycelium production, acute and chronic toxicity in experimental animals and the frequency of toxinogenesis of 21 isolates of P. roqueforti (including a brown mutant) isolated from different materials, foods especially, were also studied. An hypothesis on the absence of PR toxin in cheeses fermented with P. roqueforti is also advanced
A biphenyl, a dihydrophenanthrene and a xanthone from Clusia paralycola
No full textA prenylated biphenyl was isolated in a re-examination of the roots of Clusia paralycola and attributed the structure (5a) and the name clusiaparalycoline D for the similarity with other biphenyls isolated from the same source. A second product, isomeric with the previously isolated paralycolin A, was assigned a 9,10-dihydrophenanthrene structure (6a) and named paralycolin B
Three new flavanone derivatives from the root bark of Sorocea bonplandii Baillon
No full textThree new flavanone derivatives named sorocein C (2), sorocein D (1) and sorocein H (3) together with the known artonin D, kuwanon C, cyclomorusin, and kuwanon J were isolated from the methanolic extract of the roots of Sorocea bonplandii. The structures were assigned on the basis of spectroscopic evidences
Three new Diels-Alder type adducts from the roots of Sorocea bonplandii Baillon Heterocycles
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