4-hydroxy-2,2,6,6-tetramethylpiperidine-N-oxyl January 19, 2018 4-hydroxy-2,2,6,6-tetramethylpiperidine-N-oxyl Trade Name Orphan Indication Familial cerebral cavernous malformations EU Market Approval EU EU Designation Date 2017-12-12 00:00:00 Sponsor Premier Research Group Limited