A. A. Ali

Lignan glycosides from stems of Salvadora persica

Abstract From stems of Salvadora persica , five glycosides were isolated. Two are new and identified as sodium 1- O -benzyl-β- d -glucopyranoside-2-sulphate (salvadoside) and 5,5′-dimethoxylariciresinol 4,4′bis- O -β- d -glucopyranoside (salvadoraside), in addition to syringin, liriodendrin and sitosterol 3- O -glucopyranoside. This represents the first report of syringin and lignan glycosides from the family Salvadoraceae.

Oxocrinine and other alkaloids from Crinum americanum

Abstract From bulbs of Crinum americanum oxocrinine, an intermediate in the biosynthesis of Amaryllidaceae alkaloids, was isolated for the first time. In addition, the plant contains crinine, flexinine, O-acetylcrinine, lycorine, hippadine, pratorinine, pratorimine, pratosine, ungeremine and trisphaeridine. The alkaloids were identified by spectroscopic evidence, chemical transformations and partial syntheses.

Three isoflavonoids from Iris germanica

Abstract From the rhizome of Iris germanica one new hexaoxygenated isoflavone, two new polyoxygenated isoflavone glucosides, the known isoflavonoids irisolidone, irigenin and iridin and acetovanillone, sitosterol, α-amyrin and β-amyrin were isolated. The structures of the new compounds were established by chemical and spectroscopic means and by correlation with known constitutents.

Relative configuration of the alkaloid augustamine

Abstract Structural confirmation and the relative configuration of the alkaloid augustine were achieved by NMR spectral analysis. The high resolution MS fragmentation pattern of the alkaloid is also discussed.

Two non-hydroxylated alkaloids in Crinum augustum☆

Abstract Several alkaloids were isolated from Crinum augustum grown in Assiut, Egypt. Two were identified as lycorine and buphanisine. In addition two new non-hydroxylated alkaloids of identical molecular formula C 17 H 19 NO 4 were investigated by spectroscopic methods. The gross structure of the first, termed augustine, belongs to the 1,2-epoxy-5, 10-b-ethanophenanthridine-type. In contrast the second could not be related to any of the known alkaloid types of the Amaryllidaceae.

Chromones and flavans from Pancratium maritimum.

Abstract A new chromone(5,7-dihydroxy-6-methoxy-2,8-dimethyl) and a new flavan (4-hydroxy-5,7-dimethoxy-8-methyl), together with two known chromones and a flavan were isolated from the bulbs of Pancratium maritimum . The two compounds were characterized by spectral analysis.

2-O-acetyl chlidanthine; An alkaloid from Haemanthus multiflorus

Abstract The bulbs of Haemanthus multiflorus afforded, in addition to four known alkaloids, a new Amaryllidaceae alkaloid, 2- O -acetylchlidanthine. Its structure was elucidated by spectroscopic methods as well as by chemical transformations

Four 6-hydroxylated alkaloids in the crinine series from Crinum augustum

Abstract The structures of five alkaloids present in Crinum augustum were elucidated by spectral arguments. Four of them were shown to be new and constitute two pairs of epimers: 6-α- and 6-β-hydroxybuphanisine and 6-α- and 6-β-hydroxycrinine. The fifth alkaloid was identified as crinamine.

Anthraquinone derivatives from Gladiolus segetum

Abstract Rhizomes of Gladiolus segetum contain, in addition to desoxyerythrolaccin, the new anthraquinone pigment 3,8-dihydroxy-6-methoxy-1-methylanthraquinone-2-carboxylic acid.

The postpartum period in dromedary camels: Uterine involution, ovarian activity, hormonal changes, and response to GnRH treatment

The aim of the present study was to investigate the time for complete uterine involution and resumption of ovarian activity in postpartum dromedary camels, relative to hormonal changes. A total of six females were examined by ultrasonography twice weekly starting 3d after parturition. GnRH was administered when the follicles reached ≥0.9cm diameter. Blood samples were collected for hormonal analysis. Results revealed that the mean intervals for complete involution of the previously gravid horn, non-gravid horn, and cervix were 34.33±3.9, 29.01±0.81, and 28.71±1.51d, respectively. After GnRH treatment (Days 17-34), five of the six camels had ovulated. The corpus luteum was detected by Day 4.1±1.6 after GnRH treatment and lasted for 6±1.1d. Serum progesterone (P4) was basal and increased only after GnRH treatment. Serum estradiol 17-β (E2) peaked twice: when a large follicle was detected and 8.5±2.8d post-GnRH treatment. The serum FSH pattern was biphasic, with two peaks just before the recruitment of small follicles and 4.67±4.1d after GnRH treatment. The five ovulating females were mated; two conceived after the first service and three after the second service. The interval from calving to conception was 78.16±3.71d. It was concluded that in dromedary camels, involution of the uterus is completed by the 5th week postpartum, these camels are highly responsive to early GnRH treatment, and they can be mated between the 5th and 6th week after parturition with encouraging conception rates.