NATEGLINIDE

                    trans-4-(1-methylethyl)cyclohexane carboxylic acid

NEBIVOLOL

                    5-fluoro-2-hydroxy acetophenone 
                   6-FLUORO-4-OXO-1BENZOPYRAN-2-CARBOXYLIC ACID
                   6-FLURO-3, 4-DIHYDRO-2H-1-BENZOPYRAN-2-CARBOXYLIC ACID

NELFINAVIR

                    3-acetoxy-2-methylbenzoic acid 

                    3-acetoxy-2-methylbenzoyl chloride 

NIZATIDINE

                    dimethyl aminoacetonitrile

                    dimethyl aminothio acetmide

                    2-dimethylaminomethyl-4-chloromethyl-4-hydroxyl thiazoline

                    2-dimethylaminomethyl-4-chloromethylthiazole hcl

                    2-(n,n-dimethylaminomethyl)-4-carbethoxy thiazole

                    s-(2-dimethylaminomethyl)-4-thiazolemethyl isothioure dihcl

                    2-(dimethylaminomethyl)4-thiazolemethanol

                    n-(2-thioethyl)-n’-methyl-2-nitro-1’,1-ethendiamine

                    n-(2-chloroethyl)-n’-methyl-2-nitro-1’,1-ethendiamine 

NIMODIPINE 

                    isopropyl 3-aminocrotonate

                    2-methoxy ethyl aceto acetate

                    2-methoxyethyl-2-(3-nitrobenzylidene) aceto acetate 

                    nitrendipine 

                    ethyl 3-aminocrotonate

                    methyl 3-aminocrotone

                    methoxy ethyl-3-amino crotonate