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(2R,3S,5S)-3-(benzyloxy)-5-[2-[[(4-methoxyphenyl)diphenylmethyl]amino]-6-(phenylmethoxy)-9H-purin-9-yl]-2-(benzyloxymethyl)cyclopentanol; CAS No.: 142217-78-5; This advanced purine-cyclopentanol conjugate highlights ChemShuttle s custom synthesis capabilities for PROTAC degraders. The trityl-protected amino group and diphenylmethyl ether enable controlled release in cellular environments. Our synthesis integrates Miyaura borylation for purine functionalization and enzymatic resolution for cyclopentanol stereocontrol. The product serves as a warhead-linker hybrid for targeted protein degradation studies, reflecting our commitment to cutting-edge therapeutic modalities.