Search results for "Opium"

ChemInform Abstract: New Studies and a Reinvestigation on (4 + 2) Cycloadditions of (-)- Thebaine: Asymmetrical Diels-Alder Reactions with a Conforma…

2010

Some novel Diels-Alder reactions of the opium alkaloid (−)-thebaine (1) as an electron-rich diene and a reinvestigation of its reactions with cyclic and acyclic dienophiles are described. The π-facial selectivity has been studied on the basis of structural analyses of the cycloadducts. Some related results on [4 + 2] cycloaddition reactions of 1-methoxy-1,3-cyclohexadiene (11) are also reported.

CCDC 2057854: Experimental Crystal Structure Determination

2021

Related Article: Todd N. Poe, Maria J. Beltra��n-Leiva, Cristian Celis-Barros, William L. Nelson, Joseph M. Sperling, Ryan E. Baumbach, Harry Ramanantoanina, Manfred Speldrich, Thomas E. Albrecht-Scho��nzart|2021|Inorg.Chem.|60|7815|doi:10.1021/acs.inorgchem.1c00300

Engineered Ferritin with Eu3+ as a Bright Nanovector: A Photoluminescence Study

2022

Ferritin nanoparticles play many important roles in theranostic and bioengineering applications and have been successfully used as nanovectors for the targeted delivery of drugs due to their ability to specifically bind the transferrin receptor (TfR1, or CD71). They can be either genetically or chemically modified for encapsulating therapeutics or probes in their inner cavity. Here, we analyzed a new engineered ferritin nanoparticle, made of the H chain mouse ferritin (HFt) fused with a specific lanthanide binding tag (LBT). The HFt-LBT has one high affinity lanthanide binding site per each of the 24 subunits and a tryptophane residue within the tag that acts as an antenna able to transfer …

Effect of air-absorbed oxygen and moisture on the chemical stability of photoexcitedMg,ZnandEuphthalocyanines in dimethylformamide

2006

Absorption of oxygen and moisture from air by MPc-DMF systems was studied and related to the molecular stability demonstrated by phthalocyanine complexes (unsubstituted MPc's : MgPc , ZnPc and EuPc2; Pc = phthalocyanine ligand, C32H16N8) subjected to UV irradiation. A lower stability of air-exposed dimethylformamide solutions is observed and is due to a specific affinity for molecular oxygen revealed by the Pc macrocycle. SEM results proved oxygen molecules fixed to the phthalocyanine solids by forces strong enough to sustain desorption under vacuum. Absorption curves determined for MPc-DMF systems also indicate oxygen accommodated by the phthalocyanine moiety. This explains the predominant…

CCDC 1049500: Experimental Crystal Structure Determination

2015

Related Article: Alina S. Dinca, Sergiu Shova, Adrian E. Ion, Catalin Maxim, Francesc Lloret, Miguel Julve, Marius Andruh|2015|Dalton Trans.|44|7148|doi:10.1039/C5DT00778J

Tiotropium in asthma: Back to the future of anticholinergic treatment

2017

Abstract Asthma is among the most common chronic diseases worldwide; however, despite progresses in the understanding of the patho-physiological mechanisms and advances in the development of new therapeutic options and strategies, the disease remains uncontrolled in a not trivial proportion of subjects. Thus, the need of new molecules to treat the underlying biological and functional abnormalities and to control symptoms is strongly advocated by clinicians. In this scenario, the most recent GINA guidelines have included the use of tiotropium bromide in the most severe and uncontrolled forms of the disease, in addition to treatment with inhaled corticosteroid plus long acting beta adrenergic…

The effect of tiotropium/olodaterol versus tiotropium on COPD exacerbation rates in patients with/without frequent exacerbation history

2019

Background: Patients with COPD with a history of frequent exacerbations are at increased risk of future exacerbations. There are limited data as to whether combining LAMA/LABA reduces exacerbation risk in all patients. We investigated whether tiotropium/olodaterol (T/O) reduced exacerbation rate versus tiotropium (tio) in patients with a range of exacerbation histories. Methods: TONADO 1+2 (NCT01431274/NCT01431287) and DYNAGITO (NCT02296138) were 52-week, parallel-group, randomised, double-blind, Phase III trials in COPD patients with FEV1 Results: There was a lower rate of moderate/severe exacerbations with T/O (0.68 per patient-year) than tio (0.77 per patient-year) (rate ratio [RR] vs ti…

The Effect of Tiotropium/Olodaterol versus Salmeterol/Fluticasone on Left Ventricular Function and Lung Hyperinflation in Patients with COPD

2019

Benefits of tiotropium/olodaterol compared with tiotropium in patients receiving COPD LAMA at baseline: pooled analysis of 4 clinical trials

2020

Determining SGRQ and TDI responder rates across the duration of clinical trials: Results from tiotropium + olodaterol in COPD

2017

Introduction: Patient-reported outcomes (PROs) are important in COPD for understanding patients’ symptoms and experience of the disease. Responder rates at specific timepoints are frequently used to analyse clinically important improvements in PROs. Alternatively, responders can be defined using average PRO improvement vs. baseline over the whole study period or the last two timepoints, as recently discussed by the FDA. Aims and objectives: To compare three techniques for determining responder rates of St. George’s Respiratory Questionnaire (SGRQ) and transition dyspnoea index (TDI). Methods: Two double-blind, replicate, Phase III, 52-week TONADO trials compared tiotropium + olodaterol (T+O…