Synonyms: Thulium,tris(2,2,6,6-tetramethyl-3,5-heptanedionato)- (7CI,8CI); Thulium, tris(2,2,6,6-tetramethyl-3,5-heptanedionato-O,O')-,(OC-6-11)-; Thulium, tris(2,2,6,6-tetramethyl-3,5-heptanedionato-kO,kO')-, (OC-6-11)- (9CI); 3,5-Heptanedione,2,2,6,6-tetramethyl-, thulium complex; NSC 174896; Thuliumtris(2,2,6,6-tetramethyl-3,5-heptanedionate); Thuliumtris(dipivaloylmethanate); Tris(2,2,6,6-tetramethyl-3,5-heptanedionato)thulium;Tris(dipivalomethanato)thulium; Tris(dipivaloylmethanato)thulium