| Naproxen Imp. O (EP): 6-Methoxynaphthalene-2-carboxylic Acid (6- Methoxy-2-naphthoic Acid; 2-Carboxy-6-methoxynaphthalene) | 2471-70-7 | C12H10O3 |
| Naproxen Impurity 1 | 60756-73-2 | C13H12O3 |
| Naproxen Impurity 2 | 2601735-81-1 | C18H22O4 |
| Naproxen Impurity A | 52079-10-4 | C13H12O3 |
| Naproxen Impurity B | 89617-86-7 | C14H13ClO3 |
| Naproxen Impurity C | 84236-26-0 | C14H13BrO3 |
| Naproxen Impurity E | 26159-35-3 | C15H16O3 |
| Naproxen Impurity F | 31220-35-6 | C16H18O3 |
| Naproxen Impurity H | 5111-66-0 | C11H10O2 |
| Naproxen Impurity I | 23981-47-7 | C13H12O3 |
| Naproxen impurity L | 3900-45-6 | C13H12O2 |
| Naproxen Impurity M | 93-04-9 | C11H10O |
| Naproxen Impurity N | 5111-65-9 | C11H9BrO |
| Naproxen Isopropyl Ester | 156967-24-7 | C17H20O3 |
| Naproxen Related Compound A | 2471-70-7 | C12H10O3 |
| Naproxen Related Compound A | 2471-70-7 | C12H10O3 |
| Naproxen Related Compound K | 77301-42-9 | C13H14O2 |
| Naratriptan | 121679-13-8 | C17H25N3O2S |
| Narcissin | 604-80-8 | C28H32O16 |
| Narcotoline | 521-40-4 | C21H21NO7 |
| Naringenin impurities1 | 14259-46-2 | C27H32O14 |
| Nateglinide Imp. A (EP): trans-4-(1-Methylethyl)cyclohexanecarboxylic Acid | Not available | C10H18O2 |
| Nateglinide Imp. B (EP): N-[[trans-4-(1-Methylethyl)cyclohexyl]carbonyl]-L- phenylalanine (Nateglinide L-Phenylalanine Isomer) | 105816-05-5 | C19H27NO3 |
| Nateglinide Imp. D (EP): (2S)-2-Amino-3-phenylpropanoic Acid (Phenylalanine) | 63-91-2 | C9H11NO2 |
| Nateglinide Imp. E (EP): N-[(trans-4-Ethylcyclohexyl)carbonyl]-D- phenylalanine (Nateglinide Ethyl Analog) | 105746-45-0 | C18H25NO3 |
| Nateglinide impurity A | 7077-05-6 | C10H18O2 |
| Nateglinide impurity A | 7077-05-6 | C10H18O2 |
| Nateglinide impurity B | 105816-05-5 | C19H27NO3 |
| Nateglinide impurity B | 105816-05-5 | C19H27NO3 |
| Nateglinide impurity C | 105816-06-6 | C19H27NO3 |
| Nateglinide Impurity Dicyclohexylammonium Salt) Imp. G (EP): Ethyl N-[[trans-4-(1-Methylethyl)cyclohexyl] carbonyl]-D-phenylalaninate (Nateglinide Ethyl Ester) | 187728-85-4 | C21H31NO3 |
| Nateglinide Isopropyl Ester | Not available | C22H33NO3 |
| Nateglinide Methyl Ester | 105746-47-2 | C20H29NO3 |
| Nateglinide Related Compound A | 7077-05-6 | C10H18O2 |
| Nateglinide Related Compound A (trans-4-isopropylcyclohexanecarboxylic acid) | Not available | C10H18O2 |
| Nateglinide Related Compound B | 105816-05-5 | C19H27NO3 |
| NBC6 | 2068818-02-8 | C18H16BCl3N2O2 |
| NBC19 | 2068818-75-5 | C24H26BCl3N2O2 |
| Nbutyl trifluoromethanesulfonate | 75618-25-6 | C5H9F3O3S |
| Neamine | 3947-65-7 | C12H26N4O6 |
| Neamine | 3947-65-7 | C12H26N4O6 |
| Nebivolol EP Impurity A | 1696472-15-7 | C22H26FNO4 |
| Nebivolol EP Impurity D | 119365-26-3 | C22H25F2NO4 |
| Nebivolol for peak identification | 118457-14-0 | C22H25F2NO4 |
| Nebivolol Impurity 1 (RR,SS) | 1360598-84-0 | C22H25F2NO4 |
| Nebivolol Impurity 10 | 119365-25-2 | C22H25F2NO4 |
| Nebivolol Impurity 11 | 99200-09-6 | C22H25F2NO4 |
| Nebivolol Impurity 11 (D-Nebivolol) HCl | 213132-06-0 | C22H26ClF2NO4 |
| Nebivolol Impurity 15 | 1315508-93-0 | C11H12ClFO2 |
| Nebivolol Impurity 16 | 1315508-96-3 | C11H12ClFO2 |
| Nebivolol Impurity 17 | 1315508-95-2 | C11H12ClFO2 |
| Nebivolol Impurity 18 | 1315508-94-1 | C11H12ClFO2 |
| Nebivolol Impurity 20 | 2415933-03-6 | C22H25F2NO4 |
| Nebivolol Impurity 21 | 1391051-68-5 | C22H24F2N2O5 |
| Nebivolol Impurity 22 | 876514-31-7 | C11H11FO2 |
| Nebivolol Impurity 23 | 118457-15-1 | C22H25F2NO4 |
| Nebivolol Impurity 24 | 118457-16-2 | C22H25F2NO4 |
| Nebivolol Impurity 27 (Hydrochloride) | 1803397-45-6 | C29H32ClF2NO4 |
| Nebivolol Impurity 28 | 129050-23-3 | C11H11FO2 |
| Nebivolol Impurity 29 | 197706-50-6 | C11H11FO2 |
| Nebivolol Impurity 33 | 129101-37-7 | C10H9FO3 |
| Nebivolol Impurity 34 | 129101-36-6 | C10H9FO3 |
| Nebivolol Impurity 35 | 129050-25-5 | C11H11FO3 |
| Nebivolol Impurity 38 | 1335103-90-6 | C12H13FO3 |
| Nebivolol Impurity 47 | 1030385-16-0 | C18H20FNO2 |
| Nebivolol Impurity 75 | 99199-91-4 | C18H20FNO2 |
| Nefazodone N-Oxide | Not available | C25H32ClN5O3 |
| Nefazodone Related Compound A | 52605-52-4 | C13H19Cl3N2 |
| Nefopam (Hydrochloride) | 23327-57-3 | C17H20ClNO |
| Nefopam Impurity 5 | 76528-10-4 | C17H19NO2 |
| Nefopam Impurity 6 | 108941-80-6 | C16H15NO3 |
| Nefopam Impurity 7 | 24833-47-4 | C17H17NO3 |
| Nefopam Impurity 10 | 60725-36-2 | C17H21NO2 |
| Nefopam N-Oxide | 66091-32-5 | C17H19NO2 |
| Nelfinavir Sulfone | 1041389-29-0 | C32H45N3O6S |
| Nelfinavir Sulfoxide | 1041389-28-9 | C32H45N3O5S |
| Neodiosmin | 38665-01-9 | C28H32O15 |
| Neohesperidin dihydrochalcone impurity B | 38665-01-9 | C28H32O15 |
| Neohesperidin-dihydrochalcone impurity B | 38665-01-9 | C28H32O15 |
| Neomycin sodium salt | 1476-53-5 | C31H35N2NaO11 |
| Neomycin Sulfate EP Impurity A (Tobramycin EP Impurity C) | 3947-65-7 | C12H26N4O6 |
| Neomycin Sulfate EP Impurity B | 54617-39-9 | C14H28N4O7 |
| Neomycin Sulfate EP Impurity C | 66-86-4 | C23H46N6O13 |
| Neomycin Sulfate EP Impurity D | 534-47-4 | C12H25N3O7 |
| Neomycin Sulfate EP Impurity E | 7542-37-2 | C23H45N5O14 |
| Neomycin Sulfate EP Impurity E Sulfate Salt | 1263-89-4 | C23H47N5O18S |
| Neomycin Sulfate EP Impurity F | 51795-47-2 | C23H45N5O14 |
| Neomycin Sulfate EP Impurity G | 54617-40-2 | C25H48N6O14 |
| Neostigmine EP Impurity A Iodide | 2498-27-3 | C9H14INO |
| Neostigmine EP Impurity A Metilsulfate | 4312-54-3 | C10H17NO5S |
| Neostigmine EP Impurity B | 99-07-0 | C8H11NO |
| Neostigmine EP Impurity C | 16088-19-0 | C11H16N2O2 |
| Neostigmine EP Impurity C-D6 | 2470126-73-7 | C11H16N2O2 |
| Neostigmine Impurity 4 | 619-60-3 | C8H11NO |
| Neostigmine Impurity 5 | 611-24-5 | C7H9NO |
| Neostigmine Impurity 6 | 4939-59-7 | C12H17N3O3 |
| Neostigmine Impurity 7 | 3743-22-4 | C8H11NO |
| Neostigmine Impurity 8 Metilsulfate | 39218-17-2 | C11H19NO5S |
| Neostigmine Impurity 13 Metilsulfate | 64050-77-7 | C12H20N2O6S |
| Neostigmine Impurity 14 Metilsulfate | 64051-18-9 | C11H18N2O6S |
| Neostigmine impurity A | Not available | C9H14NO+ |
| Neostigmine mesylate impurity16 | 68468-95-1 | C8H7ClN4S |
| Neostigmine mesylate impurity17 | 63468-95-1 | C17H22N2O2 |
| Neotame Related Compound A | 190910-14-6 | C19H28N2O5 |
| Nepafenac Related Compound A | 1246956-18-2 | C15H16N2O2 |
| Nepafenac Related Compound B | 51135-38-7 | C15H11NO2 |
| Nepafenib impurity 2 | 78281-61-5 | C16H16N2O2S |
| Nepafenib impurity 4 | 1246956-18-2 | C15H16N2O2 |
| Nepafenib impurity 5 | 78281-71-7 | C15H13ClN2O2 |
| Nepafenib impurity 6 | 98790-48-8 | C14H11NO3 |
| Nepafenib impurity 7 | 1881270-49-0 | C15H12N2O2 |
| Nepafenib impurity 10 | 173262-94-7 | C18H20N2O2S |
| Nepafenib impurity 11 | 1881270-48-9 | C18H19ClN2O2S |
| Nepafenib impurity 13 | 98190-48-8 | C13H13N3S |
| Nepafenib impurity 14 | 51135-38-7 | C15H11NO2 |
| Neratinib dimethylamine N-oxide | 1376615-55-2 | C30H29ClN6O4 |
| Neratinib Impurity 3 | 591-33-3 | C10H13NO2 |
| Neratinib Impurity 4 | 871895-08-8 | C10H12N2O4 |
| Neratinib Impurity 5 | 214476-09-2 | C12H8ClN3O3 |
| Neratinib Impurity 6 | 102137-46-2 | C12H12N2O |
| Neratinib Impurity 7 | 848134-24-7 | C12H11ClN2O |
| Neratinib Impurity 8 | 105326-69-0 | C12H11ClN2O |
| Neratinib Impurity 12 | 1144516-21-1 | C29H27ClN6O2 |
| Neratinib Impurity 13 | 1144516-20-0 | C25H20ClN5O3 |
| Neratinib Impurity 14 | 915941-95-6 | C26H22ClN5O3 |
| Neratinib Impurity 15 | 1144516-13-1 | C26H20ClN5O5 |
| Neratinib Impurity 16 | 1469746-91-5 | C30H30N6O3 |
| Neratinib Impurity 17 | 1376619-98-5 | C30H31ClN6O4 |
| Neratinib Impurity 18 | 915942-22-2 | C34H33ClN6O7 |
| Neratinib Impurity 19 | 848139-78-6 | C24H20ClN5O2 |
| Neratinib Impurity 20 | 524955-09-7 | C12H11ClN2O |
| Neratinib Impurity 24 | 848133-75-5 | C14H13N3O3 |
| Neratinib Impurity 26 | 1144516-17-5 | C31H27ClN6O5 |
| Neratinib Impurity 28 | 1259519-60-2 | C7H14ClNO2 |
| Neratinib Impurity 29 | 149586-32-3 | C6H11NO2 |
| Neratinib Impurity 30 | 848133-74-4 | C16H19N3O4 |
| Neratinib Impurity 31 | 1201080-20-7 | C12H15NO4 |
| Neratinib Impurity 32 | 1201080-23-0 | C12H14N2O6 |
| Neratinib Impurity 33 | 1222172-49-7 | C12H16N2O4 |
| Neratinib Impurity 34 | 1222172-50-0 | C15H17N3O4 |
| Neticonazole Impurity 1 | 111-24-0 | C5H10Br2 |
| Netilmicin for peak identification | 56391-57-2 | C42H92N10O34S5 |
| Netilmicin sulfate for LC assay | 56391-57-2 | C42H92N10O34S5 |
| Netupitant impurities 3 | 873443-66-4 | C13H8Cl2N2 |
| Netupitant impurities 4 | 873443-69-7 | C18H19ClN4 |
| Netupitant impurities 5 | 825638-02-6 | C18H20N4 |
| Netupitant impurities 6 | 85068-33-3 | C10H6F6O2 |
| Netupitant impurities 7 | 144632-97-3 | C12H10F6O2 |
| Netupitant impurities 9 | 289686-73-3 | C11H8F6O2 |
| Netupitant impurities 10 | 2347562-52-9 | C18H21N3O2 |
| Netupitant impurities 12 | 290297-24-4 | C17H22N4 |
| Netupitant impurities 13 | 910808-11-6 | C30H32F6N4O2 |
| Netupitant impurity 2 | 910808-12-7 | C30H32F6N4O2 |
| Nevirapine Anhydrous Imp. A (EP): 11-Ethyl-4-methyl-5,11-dihydro- 6H-dipyrido [3,2-b:2',3'-e][1,4]diazepin-6-one | 133627-17-5 | C14H14N4O |
| Nevirapine Anhydrous Imp. B (EP): 4-Methyl-5,11-dihydro-6H- dipyrido[3,2-b:2',3'-e][1,4]diazepin-6-one | 287980-84-1 | C12H10N4O |
| Nevirapine Anhydrous Imp. C (EP): 4-Methyl-11-propyl-5,11-dihydro- 6H-dipyrido[3,2-b:2',3'-e][1,4]diazepin-6-one | 287980-85-2 | C15H16N4O |
| Nevirapine Dimer | 1391054-30-0 | C30H26N8O2 |
| Nevirapine EP Impurity D | 1391054-30-0 | C30H26N8O2 |
| Nevirapine for peak identification | 129618-40-2 | C15H14N4O |
| Nevirapine impurity B | 287980-84-1 | C12H10N4O |
| Nevirapine N1-Oxide | 162255-73-4 | C15H14N4O2 |
| Nevirapine N10-Oxide | 1027324-99-7 | C15H14N4O2 |
| Nevirapine Related Compound A | 133627-17-5 | C14H14N4O |
| Nevirapine Related Compound C | 287980-85-2 | C15H16N4O |
| NG, NG'-Dimethyl-L-Arginine-d6 (Arginine impurity 19) | 1331888-08-4 | C8H18N4O2 |
| NG-Hydroxy-L-arginineacetatesal | 53598-01-9 | C8H18N4O5 |
| NHS-Fluorescein | 135795-62-9 | C24H15NO7 |
| Nicardipine | 55985-32-5 | C26H29N3O6 |
| Nicardipine EP Impurity A | 59875-58-0 | C26H27N3O6 |
| Nicardipine EP Impurity A HCl | 1216817-27-4 | C26H28ClN3O6 |
| Nicardipine EP Impurity B DiHCl | 71784-27-5 | C35H42Cl2N4O6 |
| Nicardipine for system suitability | 54527-84-3 | C26H30ClN3O6 |
| Nicardipine Impurity 8 | 2469735-68-8 | C15H15NO5 |
| Nicardipine Impurity 13 | 2469555-30-2 | C15H17NO6 |
| Nicardipine Impurity 15 | 71791-90-7 | C35H40N4O6 |
| Nicardipine Impurity 19 | 206976-29-6 | C17H18N2O5 |
| Nicardipine Impurity 20 | 167963-66-8 | C18H17N3O6 |
| Nicardipine Impurity 44 | 101-98-4 | C10H15NO |
| Nicardipine N-Oxide | Not available | C26H29N3O7 |
| Nicathamide impurity 1 | 2398-81-4 | C6H5NO3 |
| Nicergoline for peak identification | 27848-84-6 | C24H26BrN3O3 |
| Nicergoline for system suitability | 27848-84-6 | C24H26BrN3O3 |
| Nicergoline Imp. A (EP): [(6aR,9R,10aS)-10a-Methoxy- 4,7-dimethyl-4,6,6a,7,8,9,10,10a-octahydro- indolo[4,3-fg]quinolin-9-yl]methyl 5-Chloro- pyridine-3-carboxylate (Chloronicergoline) | 38536-28-6 | C24H26ClN3O3 |
| Nicergoline Imp. C (EP): [(6aR,9R,10aS)-10a-Methoxy- 4,7-dimethyl-4,6,6a,7,8,9,10,10a-octahydro- indolo[4,3-fg]quinolin-9-yl]methanol (Methylmethoxylumilysergol) | 35155-28-3 | C18H24N2O2 |
| Nicergoline Imp. D (EP): 5-Bromopyridine-3-carboxylic Acid | 20826-04-4 | C6H4BrNO2 |
| Nicergoline impurity D | 20826-04-4 | C6H4BrNO2 |
| Nicorandil Amide | 6265-73-2 | C8H10N2O2 |
| Nicorandil amide | 6265-73-2 | C8H10N2O2 |
| Nicorandil Dimer Iodide | 2250142-71-1 | C16H18IN5O5 |
| Nicorandil EP Impurity C | 46053-56-9 | C8H10N2O2 |
| Nicorandil EP Impurity C Di HCl | 87330-70-9 | C8H12Cl2N2O2 |
| Nicorandil EP Impurity C Nitrate | 88598-33-8 | C8H11N3O5 |
| Nicorandil Impurity 5 | 896133-95-2 | C8H10N2O3 |
| Nicorandil Impurity 11 | 107833-98-7 | C8H9N3O5 |
| Nicorandil Impurity 18 | 2250142-73-3 | C16H18BrN5O5 |
| Nicorandil Impurity 20 | 614-18-6 | C8H9NO2 |
| Nicorandil Impurity 37 | 20739-39-3 | C4H10ClNO2 |
| Nicorandil Impurity 38 | 89166-58-5 | C4H8N2O4 |
| Nicorandil Impurity 39 | 2250142-70-0 | C16H18N5O5+ |
| Nicorandil Impurity 41 | 2365474-05-9 | C24H27N7O6+2 |
| Nicorandil Impurity 44 | 1854-30-4 | C4H9NO2 |
| Nicorandil Impurity 45 | 65141-46-0 | C8H9N3O4 |
| Nicorandil Impurity 46 | 646-02-6 | C2H6N2O3 |
| Nicorandil Impurity 54 | 13589-33-8 | C4H8N2O3 |
| Nicorandil impurity A | 65141-47-1 | C8H9N3O4 |
| Nicorandil Impurity B | 6265-73-2 | C8H10N2O2 |
| Nicorandil Impurity D | 40055-37-6 | C8H8N2O |
| Nicorandil Nitrate | 65141-58-4 | C8H10N4O7 |
| Nicorandil nitrate | 65141-58-4 | C8H10N4O7 |
| Nicotianamine | 34441-14-0 | C11H19N3O6 |
| Nicotinamide EP Impurity A | 59-67-6 | C6H5NO2 |
| Nicotinamide EP Impurity B | 100-54-9 | C6H4N2 |
| Nicotinamide EP Impurity C (Picolinamide) | 1452-77-3 | C6H6N2O |
| Nicotinamide EP Impurity D | 1453-82-3 | C6H6N2O |
| Nicotinamide EP Impurity E | 1986-81-8 | C6H6N2O2 |
| Nicotinamide Impurity 1 | 7606-13-5 | C10H14N2O |
| Nicotinamide Impurity 7 | 114-33-0 | C7H8N2O |
| Nicotinamide Impurity 8 | 4314-66-3 | C8H10N2O |
| Nicotinamide Impurity B | 100-54-9 | C6H4N2 |
| Nicotinamide Impurity D | 1453-82-3 | C6H6N2O |
| Nicotinamide Impurity E | 1986-81-8 | C6H6N2O2 |
| Nicotinamide N-Oxide | 1986-81-8 | C6H6N2O2 |
| Nicotinamide Riboside Chloride | 23111-00-4 | C11H15ClN2O5 |
| Nicotinamide riboside triflate | 445489-49-6 | C12H15F3N2O8S |
| Nicotinamide Riboside-d4 Triflate (a/b mixture) | Not available | C12H15F3N2O8S |
| nicotine benzoate | 88660-53-1 | C17H20N2O2 |
| Nicotine chloride hydrochloride | 20260-53-1 | C6H5Cl2NO |
| Nicotine EP Impurity A | 581-49-7 | C10H12N2 |
| Nicotine EP Impurity B | 487-19-4 | C10H10N2 |
| Nicotine EP Impurity C | 486-56-6 | C10H12N2O |
| Nicotine EP Impurity D | 532-12-7 | C9H10N2 |
| Nicotine EP Impurity E | 491-26-9 | C10H14N2O |
| Nicotine EP Impurity F | 494-97-3 | C9H12N2 |
| Nicotine EP Impurity G | 494-52-0 | C10H14N2 |
| Nicotine for system suitability | 65-31-6 | C11H18N2 |
| Nicotine Imp. A (EP) as Racemate: (2RS)-1,2,3,6-Tetrahydro-2,3'- bipyridyl ((RS)-Anatabine) | 2743-90-0 | C10H12N2 |
| Nicotine Imp. B (EP): 3-(1-Methyl-1H-pyrrol-2-yl)pyridine ( -Nicotyrine) | 487-19-4 | C10H10N2 |
| Nicotine Imp. C (EP): (5S)-1-Methyl-5-(pyridin-3-yl)- pyrrolidin-2-one (Cotinine) | 486-56-6 | C10H12N2O |
| Nicotine Imp. D (EP): 3-(4,5-Dihydro-3H-pyrrol-2-yl)pyridine (Myosmine) | 532-12-7 | C9H10N2 |
| Nicotine Imp. E (EP): (1RS,2S)-1-Methyl-2-(pyridin-3-yl)pyrrolidine 1- Oxide (Nicotine N -Oxide) | 491-26-9 | C10H14N2O |
| Nicotine Imp. F (EP) as Racemate: 3-[(2RS)-Pyrrolidin-2-yl]pyridine ((RS)-Nornicotine) | 5746-86-1 | C9H12N2 |
| Nicotine Imp. G (EP) as Racemate: 3-[(2RS)-Piperidin-2-yl]pyridine ((RS)-Anabasine) | 13078-04-1 | C10H14N2 |
| Nicotine Imp. G (EP): 3-[(2S)-Piperidin-2-yl]pyridine (Anabasine) | 494-52-0 | C10H14N2 |
| Nicotine impurity 2 | 2743-90-0 | C10H12N2 |
| Nicotine impurity 3 | 5746-86-1 | C9H12N2 |
| Nicotine impurity 4 | 2820-55-5 | C10H14N2O |
| Nicotine impurity 6 | 51095-86-4 | C10H14N2O |
| Nicotine impurity standard | 6019-06-3 | C17H15ClN2O3 |
| Nicotine Related Compound A | 2743-90-0 | C10H12N2 |
| Nicotine Related Compound A/EP Impurity A | 2743-90-0 | C10H12N2 |
