Biosystematics of Tetraploid Eucharis (Amaryllidaceae)
نویسندگان
چکیده
منابع مشابه
Alkaloids from Eucharis amazonica (Amaryllidaceae).
Thirteen alkaloids have been isolated from dried bulbs and leaves of flowering Eucharis amazonica (Amaryllidaceae). The alkaloids, 7-methoxyoxoassoanine, 6-O-methylpretazettine and apohaemanthamine, are reported for the first time from a natural source.
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Ungiminorine N-oxide was isolated from Puncrutium maritimum, and homolycorine N-oxide and O-methyl lycorenine N-oxide from Lapiedra martinezii. These compounds represent the first examples of naturally occurring Noxides from the Amaryllidaceae.
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Failure is the word that best describes human effort to master schistosomiasis. In 1000 B.C. schistosomes infected man, proof being recovery of calcified ova from dated Egyptian mummies. Earlier by a thousand years, vesical schistosomiasis was prevalent, to judge from references to hematuria by the local medical profession. By A.D. 1969 the world incidence of schistosomiasis was at least 150 mi...
متن کاملTwo new species of endemic Ecuadorean Amaryllidaceae (Asparagales, Amaryllidaceae, Amarylloideae, Eucharideae)
New species of the genera Stenomesson and Eucharis (Amaryllidaceae) are described from Ecuador. Stenomessonecuadorense is the second species of the genus reported from that country, and the only endemic one. It is related to Stenomessonminiatum and Stenomessoncampanulatum, both from Peru, with which it shares orange flower color and the fusion of the staminal corona to the perianth tube. It dif...
متن کاملTotal synthesis of the Amaryllidaceae alkaloid clivonine.
Two syntheses of the Amaryllidaceae alkaloid clivonine (1) are described. Both employ previously reported 7-arylhydrindane 6 as an intermediate but differ in the method employed for subsequent introduction of what becomes the ring-B lactone carbonyl carbon (C7). The synthesis featuring a Bischler-Napieralski reaction for this transformation constitutes the first asymmetric synthesis of natural ...
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ژورنال
عنوان ژورنال: Annals of the Missouri Botanical Garden
سال: 1987
ISSN: 0026-6493
DOI: 10.2307/2399399