Anticonvulsant compound

A method of treating or ameliorating a seizure-related disorder, the method comprising administering, to a subject in need of such treatment, a therapeutically effective amount of a compound selected from the group consisting of:

• wherein:
• R1 is —COOH or -alkyl-COOH;
• and
• R2 is a straight or branched alkyl or alkenyl group with 1 to 20 C atoms, and wherein the backbone of the alkyl or alkenyl group is optionally interrupted by one or more heteroatoms, or a pharmaceutically acceptable salt or solvate thereof.