Steroidal derivatives

The aim of the thesis: Study on chemical composition of starfish Acanthaster planci of Vietnam, synthesizing hydroxyl and oxime derivatives from a steroid isolated from this starfish and assessing biological activity of isolated and synthesized compounds.

26p extraenglish 24-05-2021 20 4   Download

Study on chemical composition of starfish Acanthaster planci of Vietnam, synthesizing hydroxyl and oxime derivatives from a steroid isolated from this starfish and assessing biological activity of isolated and synthesized compounds.

26p capheviahe26 25-01-2021 10 4   Download

In this paper, the synthesis of some new C ring steroidal derivatives from -pregnyne has been described. They are 9 -brom-17 -pregn-4-en-11 ,17 -diol-3-on-20-yne; 11 -formiat-9 - brom-17 -pregn-4-en-17 -ol-3-on-20-yne; 17 -pregn-11 ,17 -diol-4-en-3-on-20-yne; 9 ,11 - epoxy-17 -pregn-4-en-17 -ol-3-on-20-yne and 9 ,11 -epoxy-17 -pregn-4-en-17 -ol-3-on-20- yne. Structure of the products has been elucidated by IR, MS and 1 H-NMR methods.

3p uocvong04 24-09-2015 40 3   Download

Hormonal Evaluation Androgens are secreted by the ovaries and adrenal glands in response to their respective tropic hormones, luteinizing hormone (LH) and adrenocorticotropic hormone (ACTH). The principal circulating steroids involved in the etiology of hirsutism are testosterone, androstenedione, and dehydroepiandrosterone (DHEA) and its sulfated form (DHEAS). The ovaries and adrenal glands normally contribute about equally to testosterone production.

5p konheokonmummim 30-11-2010 91 4   Download

Rhinitis Medicamentosa Rhinitis medicamentosa (RM) is a condition that caused by overuse of topical nasal steroids. Also known as rebound or chemical rhinitis, the incidence is somewhere between 1-9% of non-allergic rhinitis and it is more common in younger adults and pregnant women. To understand the cause of RM, we must first look at some of the basic science behind the nasal mucosa. The mucosa is innervated by sympathetic fiber that release norepinephrine, which stimulate alpha 1 and alpha 2 receptors. This in turns causes vasoconstriction.

6p barbie_barbie 05-10-2010 60 4   Download

Introduction: Propionic acid derivative analgesic-antipyretics ( Table 2.1) are non-steroidal and antiinflammatory drugs. As one of mechanisms of their pharmacological actions, inhibition of prostaglandin biosynthesis can be mentioned. Although fatal cases due to propionic acid derivative analgesic-antipyretics are not many in the world, the incidence of poisoning (including survived cases) by this drug group is relatively high among therapeutic drugs in Japan [1].

10p bigbaby87 01-09-2010 103 18   Download