The trial is a Phase 1 Single Dose PK Study in Adolescent Subjects with Fragile X syndrome (FXS) or Angelman syndrome (AS).

* The primary objective of the study is to evaluate the pharmacokinetics (PK) of OV101 following a single 5 mg dose of OV101 in adolescents with FXS or AS.
* Secondary objectives are to determine the safety and tolerability of a single 5 mg dose of OV101 in adolescents with FXS or AS.