Synonyms: Lorazepam hemisuccinate;AC1L1Y4S;127930-80-7;18878-15-4;195201-27-5;4-[[7-chloro-5-(2-chlorophenyl)-2-oxo-1,3-dihydro-1,4-benzodiazepin-3-yl]oxy]-4-oxobutanoic acid;Butanedioic acid, mono(7-chloro-5-(2-chlorophenyl)-2,2-dihydro-2-oxo-1H-1,4-benzodiazepin-3-yl ester;Butanedioic acid, mono(7-chloro-5-(2-chlorophenyl)-2,3-dihydro-2-oxo-1H-1,4-benzodiazepin-3-yl) ester, (+-)-