C.I. Solvent Red 27; Oil red O; C.I. 26125; Solvent Red 27; oil red O electrophoresis; Transparent Red 5B; (1Z)-1-({4-[(E)-(2,5-dimethylphenyl)diazenyl]-2,5-dimethylphenyl}hydrazono)naphthalen-2(1H)-one; 1-({4-[(E)-(2,5-dimethylphenyl)diazenyl]-2,5-dimethylphenyl}hydrazono)naphthalen-2(1H)-one; 1-[(E)-{4-[(E)-(2,5-dimethylphenyl)diazenyl]-2,5-dimethylphenyl}diazenyl]naphthalen-2-ol; Oil red 3012