How is 17beta-Estradiol-2,3,4-13C3 (CAS: 1261254-48-1) typically synthesized?

17beta-Estradiol-2,3,4-13C3 is synthesized through a multi-step process starting from estradiol. The key steps involve derivatization of estradiol with 13C-labeled precursors, followed by purification techniques such as recrystallization and chromatography. Common catalysts include metal complexes, and the reaction conditions are optimized to achieve high yield and selectivity. The final product is a 13C-labeled estradiol derivative, used for metabolic tracing studies in biochemical research.