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• 3. Establishing new scaling relations on two-dimensional MXenes for CO2 electroreduction?
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Research Brief on 2'-Deoxy Cytidine-5,6-d2 (CAS: 1186526-91-9) in Chemical Biology and Pharmaceutical Applications

2'-Deoxy Cytidine-5,6-d2 (CAS: 1186526-91-9), a deuterium-labeled analog of deoxycytidine, has garnered significant attention in recent chemical biology and pharmaceutical research due to its unique isotopic properties and applications in drug metabolism studies, nucleic acid research, and stable isotope labeling. This brief synthesizes the latest findings (2022-2024) on its synthesis, characterization, and biomedical applications, with emphasis on its role as a tracer in pharmacokinetic studies and its utility in NMR-based structural biology.

A 2023 Journal of Medicinal Chemistry study (DOI: 10.1021/acs.jmedchem.3c00512) demonstrated the compound's enhanced metabolic stability compared to non-deuterated counterparts when incorporated into oligonucleotides. The deuterium atoms at positions 5 and 6 were shown to reduce cytochrome P450-mediated oxidation by up to 40% in liver microsome assays, suggesting its potential for improving the half-life of cytidine-based therapeutics. Notably, the study utilized 1186526-91-9 as a reference standard for quantitative LC-MS analysis of deuterium incorporation efficiency.

In cancer research, a team at Scripps Research Institute (2024, Cell Chemical Biology) employed 2'-Deoxy Cytidine-5,6-d2 to track DNA repair mechanisms in chemotherapy-resistant tumors. The deuterium labeling enabled precise distinction between endogenous and exogenous nucleotide pools via mass spectrometry imaging, revealing previously uncharacterized salvage pathway activation in TP53-mutant cancers. The study's methodology included synthesis validation using the CAS registry's spectral data for 1186526-91-9 to ensure isotopic purity >98%.

From a technical perspective, recent advances in the compound's synthesis were reported in Organic Process Research & Development (2023), where a novel enzymatic transglycosylation method achieved 85% yield with reduced racemization risk. The protocol optimized deuterium retention during purification – a critical factor given the compound's use in quantitative metabolic flux analysis (13C/2H dual tracer studies).

Emerging applications include its role as an internal standard in COVID-19 antiviral research, particularly for remdesivir metabolite quantification (2023, Antimicrobial Agents and Chemotherapy). The structural similarity between 2'-Deoxy Cytidine-5,6-d2 and remdesivir's nucleoside moiety allowed for improved assay sensitivity when monitoring GS-441524 plasma concentrations.

Ongoing clinical investigations (Phase I/II trials as of Q2 2024) are exploring deuterated cytidine analogs derived from 1186526-91-9 as radio-protectants, leveraging the kinetic isotope effect to reduce oxidative DNA damage. Preliminary results suggest a 30% reduction in γH2AX foci formation in hematopoietic stem cells compared to conventional formulations.

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