An alkaloid is a type of plant-derived organic compound. Alkaloids are generally composed of oxygen, hydrogen, carbon, and nitrogen. Some alkaloids are considered toxic, but others are often used medicinally. Alkaloids one might encount er in everyday life include caffeine, the drugs atropine and quinine, and the deadly nightshade plant. Alkaloids are relatively rare in plants. They have what's...

From cell suspension cultures of Ochrosia elliptica Labill. eight different monoterpenoid indole alkaloids were isolated and comprised three alkaloid classes viz. Corynanthe/Heteroyohimbine (tetrahydroalstonine, cathenamine, pleiocarpamine and two methoxylated heteroyohimbines), Strychnos (norfluorocurarine), Apparicine (apparicine and epchrosine). All these compounds except the Strychnos alkal...

To quantify the colchicine (alkaloid) present in Gloriosa superba by High Performance Liquid Chromatography (HPLC) method. Gloriosa superba species are known for their content of colchicine, a valuable alkaloid in the seeds and tubers (corms). HPLC analysis was carried out to confirm the presence of colchicine in Gloriosa superba. Treatment of gibberellic acid and Psedomonas aerugenosa improved...

An unprecedented organocatalytic enantioselective formal synthesis of bromopyrrole alkaloid natural products is reported. An organocatalytic aza-Michael addition using pyrroles as the N-centered nucleophile is utilized as the enantioselective step to construct the nitrogen-substituted stereogenic carbon center in bromopyrrole alkaloids in good yield and excellent enantioselectivity. The aza-Mic...

Sir,?I promised in a former letter from here to tell you what Professor Dnnstan said about the daturas from the Federated Malay States. He has just written and says : " The Datura fastiiosa seeds were found to contain 0'39 per cent, of alkaloid, which was proved to consist almost entirely of hyoscine (scopolamine). The Datura alba, seeds only furnished 0*21 per cent, of alkaloid, which was foun...

Penelitian ini bertujuan untuk mengetahui kadar senyawa flavonoid dan alkaloid dalam ekstrak kulit bawang merah (Allium cepa L.) dengan menggunakan metode refluks sokletasi. dilakukan secara kuantitatif yaitu langkah pertama pengumpulan sampel, pengolahan ekstraksi, skrining fitokimia, penetapan spektrofotometri UV-Vis. Kulit diekstraksi sokletasi pelarut etanol 96% hasil rendemen yang diperole...

I n our preceding paper [1] we reported t h e isolation of a novel, amorphous ester alkaloid from Veratrum album subsp. lobelianum (BERNH.) Suessenguth. This al­ kaloid has been found, together with protoveratrine A, germitetrine and veratroylzygadenine in the ester alkaloid fraction [2]. Acetylveratroylgermine designated originally amorphous alkaloid [1] [a]f) + 6 . 6 ° (chloroform) has, accor...

Several cDNAs of enzymes catalyzing biosynthetic pathways of plant-derived alkaloids have recently been heterologously expressed, and the production of appropriate enzymes from ajmaline and tropane alkaloid biosynthesis in bacteria allows their crystallization. This review describes the architecture of these enzymes with and without their ligands.

objective: argemone mexicana is a papaveracea plant; some reports have shown their antibacterial, anti-cancer, sedative and probably anti-anxiety properties. from their aerial parts, flavonoids and alkaloids have been isolated, which are intrinsically related to some actions on the central nervous system. the aim of this study was to evaluate the anxiolytic-like effects of the plant, using its ...