Synonyms: Holmium,tris(2,2,6,6-tetramethyl-3,5-heptanedionato)- (7CI,8CI); Holmium, tris(2,2,6,6-tetramethyl-3,5-heptanedionato-O,O')-,(OC-6-11)-; Holmium, tris(2,2,6,6-tetramethyl-3,5-heptanedionato-kO,kO')-, (OC-6-11)- (9CI); 3,5-Heptanedione,2,2,6,6-tetramethyl-, holmium complex; NSC 174895;Tris(2,2,6,6-tetramethyl-3,5-heptanedionato)holmium;Tris(dipivaloylmethanato)holmium; Tris(dipivaloylmethane)holmium