Receptos Inc.

Receptos isn't the only company in the G-coupled protein receptor oral MS drug arena, but it believes its proprietary S1P1 agonist will improve on Novartis' first-in-class S1P1 modulator Gilenya. Unlike Gilenya, which hits four of the five S1P receptor subtypes, the Receptos molecule binds selectively to S1P1 and has a predicted human half-life of approximately one day, potentially improving the safety profile and reducing complications for MS patients.