CAS 63658-52-6 appears in our catalog under these names: 1-Piperidinyloxy, 4-[[(7R)-4-hydroxy-4-oxido-10-oxo-7-[(1-oxohexadecyl)oxy]-3,5,9-trioxa-4-phosphapentacos-1-yl]dimethylammonio]-2,2,6,6-tetramethyl-, inner salt, 98%, 16:0 TEMPO PC, 1,2-dipalmitoyl-sn-glycero-3-phospho(tempo)choline. Offered by: Chemat Brand, Sigma-Aldrich, Chemat. Available pack sizes: on request, 1MG.