Práca sa zaoberá izoláciou a identifikáciou flavonoidov prítomných v listoch Holodiscus discolor (Pursh) Maxim. (Rosaceae). Z metanolového extraktu boli izolované tri flavonoidové glykozidy flavonolového typu: kempferol–3–O–ramnozid, kvercetín–3–O–glukozid (izokvercitrín) a kvercetín–3–O–ramnozid (kvercitrín), ktoré boli identifikované pomocou fyzikálno-chemických metód, porovnaním so štandardmi a literatúrou. Z rastlinného druhu Holodiscus discolor (Pursh) Maxim. boli izolované prvýkrát.
The paper deals with the isolation and identification of constituents of the leaves of Holodiscus discolor (Pursh) Maxim. (Rosaceae). Three flavonoid glycosides of flavonol type were isolated from the methanolic extract: kaempferol–3–O–rhamnoside, quercetin–3–O–glucoside (isoquercitrin) and quercetin–3–O–rhamnoside (quercitrin). Isolates were identified by physical-chemical data, by comparison with authentic samples and literature data. The above-mentioned compounds were isolated from Holodiscus discolor (Pursh) Maxim. for the first time.
Z etanolového extraktu nerozvinutých púčikov Cynara cardunculus L (Asteraceae) sa izolovali dvamonodezmozidové saponíny-cynarasaponín B a nový cynarasaponín K. Ich štruktúra bola určenána základe spektrálnych meraní, porovnaním údajov v literatúre a chromatografickým porovnanímso štandardami.
From an ethanolic extract of the flower buds of Cynara cardunculus L. (Asteraceae), two monodes-mosidic saponins, cynarasaponin B and a new cynarasaponin K, were isolated. The isolatedcompounds were identified by spectroscopic means and by comparison with standards and theliterature data.
Práca sa zaoberá izoláciou a identifikáciou látok z petroléterového a metanolového extraktu holodisku dvojfarebného – Holodiscus discolor (PURSH) MAXIM., Rosaceae. Z petroléterového extraktulistov tejto rastliny bol izolovaný b-sitosterol a taraxasterol, z metanolového extraktu luteolín-7-O-glukozid. Látky boli identifikované na základe spektrálnych údajov a porovnaním s autentickýmivzorkami.
The paper deals with the isolation of constituents from light petrol and methanol extracts of theleaves of Holodiscus discolor (PURSH) MAXIM., Rosaceae. b-sitosterol and taraxasterol wereisolated from the light petrol extract, luteolin-7-O-glucoside was isolated from the methanol extract.The isolated compounds were identified by spectroscopic means and by comparison with authentic samples.
Práca sa zaoberá izoláciou látok z petroléterového a chloroformového extraktu listov pajazmínuvencového (Philadelphus coronarius L., Saxifragaceae). Z petroléterového extraktu listov tejtorastliny bol izolovaný uvaol a 3b,28-dihydroxyolean-11(12),13(18)-dién. Z chloroformového extraktuboli izolované kumaríny (umbeliferón a skopolín), stigmasteryl-3b-D-glukozid a uhľovodík alkánového typu C29 H60. Látky boli identifikované na základe spektrálnych údajov, porovnaním soštandardami a literatúrnymi údajmi.
The paper deals with the isolation of constituents from light petrol and chloroform extracts of theleaves of Philadelphus coronarius L., Saxifragaceae. From the light petrol extract uvaol and3b,28-dihydroxyoleanane-11(12),13(18)-diene were isolated, while coumarins (umbelliferone, scopolin), stigmasteryl-3b-D-glucoside and the alcane type carbohydrate-C29H60 were isolated from thechloroform extract. The isolated compounds were identified by spectroscopic means and by comparison with standards and the literature data.
Z butanolového extraktu kvetov Lilium candidum L. sa chromatografickými deliacimi metódamiizoloval b-sitosterol a b-sitosterol glukozid, ktorých identitu sme potvrdili na základe spektrálnychúdajov a porovnaním s literárnymi údajmi. b-sitosterol glukozid nebol doteraz v rode Lilium L.opísaný.
From the butanolic extract of petals of Lilium candidum L., b-sitosterol and b-sitosterol glucosidewere isolated. The isolated compounds were identified by spectroscopic means and by comparisonwith literature data; b-sitosterol glucoside was isolated in genus Lilium L. for the first time.
Z etanolového extraktu nerozvinutých púčikov Cynara cardunculus L. (Asteraceae) sa izolovalapigenín-7-metylglukuronid a kyselina chlorogénová. Identita izolovaných látok sa potvrdila nazáklade spektrálnych údajov, porovnaním s autentickými vzorkami a hodnotami uvedenými v lite-ratúre.
From an ethanolic extract of the flower buds of Cynara cardunculus L. (Asteraceae), apigenin-7--methylglucuronide and chlorogenic acid were isolated. The isolated compounds were identified byspectroscopic means, by comparison with authentic samples and literature data.
