Chemical Name: 1-Ethyl-6-fluoro-4-oxo-7-(4-stearoylpiperazin-1-yl)-1,4-dihydroquinoline-3-carboxylic acid
Synonym: Amitriptyline USP Related Compound B ; Amitriptyline EP Impurity D ; 5-[3-(Dimethylamino)propyl]-10,11-dihydro-5H-dibenzo[a,d][7]annulen-5-ol