Abstract

SYL927 and SYL930 are selective S1P1 agonists under preclinical development. However, during their pharmacokinetic studies we detected two metabolites in rat blood that were tentatively identified as monohydroxylated metabolites of SYL927 and SYL930 based on LC–MS/MS data. In this study, we designed and synthesized possible monohydroxylated products 6a–e and used them as references to confirm the structures of the two metabolites detected by LC–MS/MS. We also evaluated the in vitro and in vivo biological activities of these two metabolites.

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