| Ribavirin Impurity 14 | 39215-01-5 | C3H3N3O2 |
| Ribavirin impurity standard | 36791-04-5 | C8H12N4O5 |
| Ribavirin Related Compound A | 39925-19-4 | C8H11N3O6 |
| Ribavirin Related Compound D | 3641-08-5 | C3H4N4O |
| Riboflavin (VB2) | 83-88-5 | C17H20N4O6 |
| Riboflavin (VB2) EP Impurity A (Riboflavin Sodium Phosphate EP Impurity E) | 1088-56-8 | C13H12N4O2 |
| Riboflavin (VB2) EP Impurity B | 1086-80-2 | C12H10N4O2 |
| Riboflavin (VB2) EP Impurity C | 2535-20-8 | C13H18N4O6 |
| Riboflavin for peak identification | 83-88-5 | C17H20N4O6 |
| Riboflavin Sodium Phosphate EP Impurity C | 86108-25-0 | C17H22N4O12P2 |
| Ribostamycin | 25546-65-0 | C17H34N4O10 |
| Ribostamycin Sulfate | 53797-35-6 | C17H36N4O14S |
| Ribosylcholine succinate impurity B (Rebosinib impurities2) | 2762182-61-4 | C21H25N7O2 |
| Ribosylcholine succinate impurity C (Rebosinib impurities3) | 1211441-59-6 | C22H28N8O |
| Rifabutin EP Impurity A | 72544-16-2 | C9H17NO |
| Rifabutin Impurity 1 | 645406-37-7 | C46H62N4O12 |
| Rifabutin impurity A | 72544-16-2 | C9H17NO |
| Rifabutin N-Oxide | 645406-37-7 | C46H62N4O12 |
| Rifampicin Imp. B (EP) as Hydrochloride: Rifampicin N-Oxide Hydrochloride | Not available | C43H59ClN4O13 |
| Rifampicin impurities4 | 1416773-23-3 | C43H58N4O12 |
| Rifampicin impurity 14 | 1416773-22-2 | C43H58N4O12 |
| Rifampicin impurity 17 | 13292-53-0 | C44H52N4O13 |
| Rifampicin N-Oxide | 51963-55-4 | C43H58N4O13 |
| Rifampicin N-Oxide Hydrochloride | Not available | C43H59ClN4O13 |
| Rifampicin quinone | 13983-13-6 | C43H56N4O12 |
| Rifamycin Impurity 18 | 31718-67-9 | C36H45NO12 |
| Rifamycin Impurity 25 | 13292-22-3 | C38H47NO13 |
| Rifamycin O | 14487-05-9 | C39H47NO14 |
| Rifapentine impurity 1 | 79039-56-8 | C45H62N4O11 |
| Rifaximin EP Impurity A | 695-34-1 | C6H8N2 |
| Rifaximin EP Impurity B (Rifamycin EP Impurity A) | 13929-35-6 | C39H49NO14 |
| Rifaximin EP Impurity C (Rifamycin) | 6998-60-3 | C37H47NO12 |
| Rifaximin EP Impurity C Sodium Salt (Rifamycin Sodium) | 14897-39-3 | C37H46NNaO12 |
| Rifaximin EP Impurity E (Rifamycin EP Impurity B) | 13553-79-2 | C37H45NO12 |
| Rifaximin EP Impurity F (Rifamycin EP Impurity C) | 14487-05-9 | C39H47NO14 |
| Rifaximin EP Impurity G | 80621-76-7 | C43H49N3O11 |
| Rifaximin for system suitability | 80621-81-4 | C43H51N3O11 |
| Rifaximin Imp. A (EP): 4-Methylpyridin-2-amine | 695-34-1 | C6H8N2 |
| Rifaximin Impurity 2 | 1351775-03-5 | C43H49N3O11 |
| Rilmenidine for system suitability | 85409-38-7 | C10H19N2O5P |
| Rilpivirine Impurity 1 | 1446439-51-5 | C22H20N6O |
| Rilpivirine Impurity 2 | 2734549-19-8 | C22H18N6O |
| Rilpivirine Impurity 3 | 2280856-38-2 | C22H18N6O |
| Rilpivirine Impurity 4 | 244768-32-9 | C11H7ClN4 |
| Riluzole impurity 1 | 144631-82-3 | C8H4BrF3N2OS |
| Riluzole impurity 2 | 88149-49-9 | C7H4Br2F3NO |
| Riluzole impurity 3 | 1391054-04-8 | C8H5F3N2OS |
| Riluzole impurity 8 | 752969-85-0 | C8H5F3N2OS |
| Riluzole impurity 9 | 461-82-5 | C7H6F3NO |
| Riluzole impurity 10 | 235101-46-9 | C8H5F3N2OS |
| Riluzole impurity 11 | 235101-36-7 | C8H5F3N2OS |
| Riluzole impurity 12 | 179070-90-7 | C8H5F3N2O2S |
| Riluzole Related Compound A | 461-82-5 | C7H6F3NO |
| Riluzole-13C-15N2 | 1215552-03-6 | C8H5F3N2OS |
| Rimegepam | 1289023-67-1 | C28H28F2N6O3 |
| Rimegepant Impurity 3 | 1289024-11-8 | C19H31NO2Si |
| Rimegepant Impurity 5 | 1190363-44-0 | C10H11NO2 |
| Rimegepant Impurity 7 | 1397526-04-3 | C10H13NO2 |
| Rimegepant Impurity 8 | 1190363-43-9 | C10H11NO2 |
| Rimegepant Impurity 9 | 1397526-01-0 | C10H11NO2 |
| Rimegepant Impurity 10 | 39713-40-1 | C10H9NO2 |
| Rimegepant Impurity 11 | 39713-36-5 | C14H13NO6 |
| Rimegepant Impurity 12 | 1397526-07-6 | C25H33F2NO2Si |
| Riociguat | 625115-55-1 | C20H19FN8O2 |
| Riociguat for FP system suitability | 625115-55-1 | C20H19FN8O2 |
| Riociguat for system suitability | 625115-55-1 | C20H19FN8O2 |
| Riociguat Impurity 4 | 625115-52-8 | C19H17FN8O2 |
| Riociguat Impurity 7 | 1702271-98-4 | C18H17FN8 |
| Riociguat Impurity 8 | 2518331-19-4 | C22H21FN8O4 |
| Riociguat Impurity 9 | 2514697-53-9 | C20H19FN8O2 |
| Riociguat Impurity 10 | 256499-19-1 | C14H13ClFN5 |
| Riociguat Impurity 11 | 1361569-18-7 | C19H15FN8O |
| Riociguat Impurity 12 | 1361569-23-4 | C20H17FN8O |
| Riociguat Impurity 13 | 1361569-10-9 | C18H13FN8O |
| Riociguat Impurity 14 | 625115-54-0 | C22H23FN8O2 |
| Risedronate EP Impurity B | 105462-23-5 | C7H11NO7P2 |
| Risedronate EP Impurity C | 105462-25-7 | C7H11NO7P2 |
| Risedronate EP Impurity D | 6419-36-9 | C7H8ClNO2 |
| Risedronate EP Impurity E | 75755-10-1 | C7H11NO6P2 |
| Risedronate Impurity 1 | 16179-97-8 | C7H8ClNO2 |
| Risedronate Impurity 2 | 1220806-40-5 | C7H13NO8P2 |
| Risedronate impurity 2 | 501-81-5 | C7H7NO2 |
| Risedronate impurity A | 1486466-30-1 | C14H16N2Na2O12P4 |
| Risedronate Impurity C | 105462-25-7 | C7H11NO7P2 |
| Risedronate Impurity D | 6419-36-9 | C7H8ClNO2 |
| Risedronate impurity E | 75755-10-1 | C7H11NO6P2 |
| Risedronate Related Compound A | 105462-23-5 | C7H11NO7P2 |
| Risedronate Related Compound B | Not available | C14H24N2Na2O16P4 |
| Risedronate Related Compound C | 75755-10-1 | C7H11NO6P2 |
| Risedronate Sodium 2.5 Hydrate Imp. B (EP): [1-Hydroxy-2-(pyridin-2-yl)ethylidene]bis (phosphonic Acid) ([1-Hydroxy-2-(pyridin-2-yl)ethane-1,1-diyl] bis(phosphonic Acid)) | 105462-23-5 | C7H11NO7P2 |
| Risedronate Sodium 2.5 Hydrate Imp. C (EP): [1-Hydroxy-2-(pyridin-4-yl)ethylidene]bis (phosphonic Acid) ([1-Hydroxy-2-(pyridin-4-yl)ethane-1,1-diyl] bis(phosphonic Acid)) | 105462-25-7 | C7H11NO7P2 |
| Risperidone Carboxylate Impurity | Not available | C24H27FN4O4 |
| Risperidone cis-N-Oxide | 1894509-66-0 | C23H27FN4O3 |
| Risperidone cis-N-Oxide | Not available | C23H27FN4O3 |
| Risperidone E-Oxime | 691007-09-7 | C23H28F2N4O2 |
| Risperidone EP Impurity A | 691007-09-7 | C23H28F2N4O2 |
| Risperidone EP Impurity B | 132961-05-8 | C23H28F2N4O2 |
| Risperidone EP Impurity C | 144598-75-4 | C23H27FN4O3 |
| Risperidone EP Impurity D | 1199589-74-6 | C23H27FN4O2 |
| Risperidone EP Impurity E | 1346602-28-5 | C24H29FN4O2 |
| Risperidone EP Impurity F | 1346603-86-8 | C24H27FN4O4 |
| Risperidone EP Impurity H | 158697-67-7 | C23H27F2N3O2 |
| Risperidone EP Impurity I | 1329796-66-8 | C35H39F2N5O3 |
| Risperidone EP Impurity J | 1346606-24-3 | C35H40F2N6O3 |
| Risperidone EP Impurity K | 106266-09-5 | C23H28N4O2 |
| Risperidone EP Impurity L | 63234-80-0 | C11H15ClN2O |
| Risperidone EP Impurity M | 84163-77-9 | C12H13FN2O |
| Risperidone EP Impurity M HCl | 84163-13-3 | C12H14ClFN2O |
| Risperidone for system suitability | 106266-06-2 | C23H27FN4O2 |
| Risperidone Imp. A (EP): 3-[2-[4-[(E)-(2,4-Difluorophenyl)- (hydroxyimino)methyl]piperidin-1-yl]ethyl]-2- methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]- pyrimidin-4-one | 691007-09-7 | C23H28F2N4O2 |
| Risperidone Imp. B (EP): 3-[2-[4-[(Z)-(2,4-Difluorophenyl)- (hydroxyimino)methyl]piperidin-1-yl]ethyl]-2- methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]- pyrimidin-4-one | 132961-05-8 | C23H28F2N4O2 |
| Risperidone Imp. C (EP): (9RS)-3-[2-[4-(6-Fluoro-1,2-benz- isoxazol-3-yl)piperidin-1-yl]ethyl]-9-hydroxy-2- methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]- pyrimidin-4-one (9-Hydroxyrisperidone) | 144598-75-4 | C23H27FN4O3 |
| Risperidone Imp. D (EP): 3-[2-[4-(5-Fluoro-1,2-benzisoxazol- 3-yl)piperidin-1-yl]ethyl]-2-methyl-6,7,8,9- tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one | 1199589-74-6 | C23H27FN4O2 |
| Risperidone Imp. E (EP): (6RS)-3-[2-[4-(6-Fluoro-1,2- benzisoxazol-3-yl)piperidin-1-yl]ethyl]-2,6- dimethyl-6,7,8,9-tetrahydro-4H-pyrido- [1,2-a]pyrimidin-4-one | 1346602-28-5 | C24H29FN4O2 |
| Risperidone Imp. H (EP): 3-[2-[4-(2,4-Difluorobenzoyl)piperidin- 1-yl]ethyl]-2-methyl-6,7,8,9-tetrahydro-4H-pyrido- [1,2-a]pyrimidin-4-one | 158697-67-7 | C23H27F2N3O2 |
| Risperidone Imp. L (EP) as Hydrochloride: 3-(2-Chloroethyl)- 2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]- pyrimidin-4-one Hydrochloride (Risperidone Piperidopyrimidinone Intermediate Hydrochloride) | 93076-03-0 | C11H16Cl2N2O |
| Risperidone Imp. M (EP) as Hydrochloride: 6-Fluoro-3-(piperidin-4-yl)-1,2- benzisoxazole Hydrochloride 3-[2-[4-[2-Fluoro-4-[4-(6-fluoro-1,2-benz- | 84163-13-3 | C12H14ClFN2O |
| Risperidone Impurity 3 | 2733216-87-8 | C12H13FN2O |
| Risperidone Impurity 4 | 439082-09-4 | C12H11FN2O |
| Risperidone Impurity 6 | 95742-19-1 | C12H14ClFN2O |
| Risperidone Impurity 7 | 152542-00-2 | C23H28FN3O3 |
| Risperidone Impurity 8 | 2416230-38-9 | C12H12FN3O2 |
| Risperidone Impurity 9 | 70381-58-7 | C11H16N2O |
| Risperidone Impurity 14 (Bicyclo Risperidone) | 2231638-02-9 | C23H28FIN4O2 |
| Risperidone impurity K | 106266-09-5 | C23H28N4O2 |
| Risperidone impurity standard | 106266-06-2 | C23H27FN4O2 |
| Risperidone N-Oxide | 832747-55-4 | C23H27FN4O3 |
| Risperidone Related Compound G | 152542-00-2 | C23H28FN3O3 |
| Risperidone trans-N-Oxide | Not available | C23H27FN4O3 |
| Risperidone Z-Oxime Impurity | 132961-05-8 | C23H28F2N4O2 |
| Risperone Impurity Standard | 106266-06-2 | C23H27FN4O2 |
| Ritalinic Acid | 19395-41-6 | C13H17NO2 |
| Ritalinic Acid Hydrochloride | 19395-40-5 | C13H18ClNO2 |
| Ritodrine | 26652-09-5 | C17H21NO3 |
| Ritodrine BP impurity E | 779979-39-4 | C17H19NO3 |
| Ritodrine Hydrochloride Imp. A (BP): Tyramine | 51-67-2 | C8H11NO |
| Ritodrine Impurity 7 | 645-58-9 | C9H14ClNO |
| Ritonavir EP Impurity A | 154212-61-0 | C14H23N3O3S |
| Ritonavir EP Impurity B | 765875-58-9 | C28H36N4O4S |
| Ritonavir EP Impurity B HCl | 165315-97-9 | C28H37ClN4O4S |
| Ritonavir EP Impurity C | 1010808-43-1 | C25H29N3O4S |
| Ritonavir EP Impurity D | 144142-33-6 | C28H30N4O5S2 |
| Ritonavir EP Impurity E | 176655-56-4 | C37H48N6O6S2 |
| Ritonavir EP Impurity F | 1010809-61-6 | C29H34N4O5S |
| Ritonavir EP Impurity G | 2034136-66-6 | C37H48N6O7S2 |
| Ritonavir EP Impurity H | 1010809-43-4 | C30H32N4O6S |
| Ritonavir EP Impurity I | 165315-26-4 | C36H46N6O5S2 |
| Ritonavir EP Impurity J | 162849-95-8 | C28H35N3O5S |
| Ritonavir EP Impurity K | 1010809-39-8 | C28H35N3O5S |
| Ritonavir EP Impurity L | 256328-82-2 | C33H43N5O4S |
| Ritonavir EP Impurity M | Not available | C18H31N3O3S |
| Ritonavir EP Impurity N | 202816-62-4 | C37H48N6O5S2 |
| Ritonavir EP Impurity O | 1414933-81-5 | C37H48N6O5S2 |
| Ritonavir EP Impurity P | Not available | C47H52N6O7S2 |
| Ritonavir EP Impurity Q | 1414933-82-6 | C37H48N6O5S2 |
| Ritonavir EP Impurity R | 1414933-80-4 | C37H48N6O5S2 |
| Ritonavir EP Impurity S | 2084828-53-3 | C52H61N7O8S2 |
| Ritonavir EP Impurity T | 869368-48-9 | C46H66N8O5S2 |
| Ritonavir Impurity 1 | 1414933-89-3 | C23H32N2O3 |
| Ritonavir Impurity 2 | 144163-97-3 | C11H8N2O5S |
| Ritonavir Impurity 3 | 144163-85-9 | C23H32N2O3 |
| Ritonavir Impurity 4 | 1010809-54-7 | C32H42N4O8S |
| Ritonavir Impurity 6 | 220887-42-3 | C37H44N2O3 |
| Ritonavir Impurity 7 | 220887-39-8 | C37H44N2O3 |
| Ritonavir Impurity 8 | 220887-40-1 | C37H44N2O3 |
| Ritonavir Impurity 23 | 1156504-13-0 | C37H46N6O5S2 |
| Ritonavir Impurity 24 | 959315-21-0 | C37H48N6O5S2 |
| Ritonavir Impurity 26 | 144164-11-4 | C23H27N3O3S |
| Ritonavir Impurity 27 | 176655-55-3 | C32H45N5O3S |
| Ritonavir Impurity 28 | 176655-57-5 | C30H39N5O5S |
| Ritonavir Impurity 29 | 959351-57-6 | C31H41N5O5S |
| Ritonavir Impurity 30 | 2519851-81-9 | C14H23N3O4S |
| Ritonavir Impurity 35 | 190649-36-6 | C43H56N6O11S2 |
| Ritonavir Impurity K | Not available | C28H35N3O5S |
| Ritonavir Impurity Q | Not available | C37H48N6O5S2 |
| Ritonavir Impurity R | Not available | C37H48N6O5S2 |
| Ritonavir Intermediate 1 | 908591-25-3 | C8H15ClN2S |
| Ritonavir Intermediate 10 | 162849-93-6 | C37H44N2O3 |
| Ritonavir Intermediate 12 | 126147-70-4 | C12H15NO4 |
| Ritonavir Intermediate 13 | 183246-46-0 | C14H23N3O3S |
| Ritonavir Intermediate 32 | 220887-41-2 | C23H32N2O3 |
| Ritonavir Intermediate 33 | 1414933-83-7 | C23H32N2O3 |
| Ritonavir Intermediate 34 | 1414933-85-9 | C23H32N2O3 |
| Ritonavir Valine | Not available | C42H57N7O6S2 |
| Rivaroxaban <I>R</I>-enantiomer | 865479-71-6 | C19H18ClN3O5S |
| Rivaroxaban Degradation Impurity A | 721401-53-2 | C18H20ClN3O4S |
| Rivaroxaban Degradation Impurity B | 2512215-49-3 | C18H22ClN3O5S |
| Rivaroxaban Degradation Impurity C | 2204368-63-6 | C23H21Cl2N3O5S2 |
| Rivaroxaban for system suitability | 366789-02-8 | C19H18ClN3O5S |
| Rivaroxaban Impurity 1 | 1429334-00-8 | C16H19N3O5 |
| Rivaroxaban Impurity 5 | 446292-08-6 | C22H19N3O6 |
| Rivaroxaban Impurity 20 | 482308-13-4 | C10H13N3O2 |
| Rivaroxaban Impurity 22 | 1498-66-4 | C21H15Cl3N2 |
| Rivaroxaban Impurity 24 | 446292-07-5 | C21H21N3O5 |
| Rivaroxaban Impurity 26 | 2097255-05-3 | C40H34N8O10 |
| Rivaroxaban Impurity 27 | 1642601-00-0 | C38H38N4O12 |
| Rivaroxaban Impurity 29 | 1838139-24-4 | C19H18ClN3O5S |
| Rivaroxaban Impurity 30 | 1429334-02-0 | C15H21N3O4 |
| Rivaroxaban Impurity 32 | 2197189-38-9 | C19H18ClN3O6S |
| Rivaroxaban Impurity 33 | 1325210-62-5 | C18H20ClN3O4S |
| Rivaroxaban Impurity 34 | 1411775-06-8 | C14H17N3O4 |
| Rivaroxaban Impurity 36 | 446292-10-0 | C14H17N3O4 |
| Rivaroxaban Impurity 38 | 1252018-10-2 | C13H17ClN2O3 |
| Rivaroxaban Impurity 39 | 1384257-81-1 | C8H9Cl2NO2S |
| Rivaroxaban Impurity 40 | 1403383-56-1 | C13H19N3O3 |
| Rivaroxaban Impurity 42 | 931117-61-2 | C19H21Cl2N3O6S |
| Rivaroxaban Impurity 43 | 148857-42-5 | C11H10ClNO3 |
| Rivaroxaban Impurity 44 | 1365267-37-3 | C22H21N3O7 |
| Rivaroxaban Impurity 45 | 438056-69-0 | C10H12N2O2 |
| Rivaroxaban Impurity 46 | 161596-47-0 | C11H9NO3 |
| Rivaroxaban Impurity 47 | 1369969-44-7 | C21H21N3O5 |
| Rivaroxaban Impurity 47 | 24065-33-6 | C5H3ClO2S |
| Rivaroxaban Impurity 48 | 1424944-35-3 | C22H19N3O6 |
| Rivaroxaban Impurity 50 | 446292-04-2 | C10H10N2O4 |
| Rivaroxaban Impurity 51 | 29518-11-4 | C10H11NO2 |
| Rivaroxaban Impurity 52 | 181140-34-1 | C11H9NO3 |
| Rivaroxaban Impurity 53 | 936232-22-3 | C17H18ClN3O4S |
| Rivaroxaban Impurity 54 | 898543-06-1 | C14H18ClN3O4 |
| Rivaroxaban Impurity 56 | 2206360-74-7 | C23H24N4O6 |
| Rivaroxaban Impurity 58 | 73825-95-3 | C19H14N2O5 |
| Rivaroxaban Impurity 59 | 36157-41-2 | C5H2Cl2O2S |
| Rivaroxaban Impurity 60 | 1450877-56-1 | C11H6ClNO4S |
| Rivaroxaban Impurity 62 | 1160169-99-2 | C19H18ClN3O6S |
| Rivaroxaban Impurity 64 | 1403383-55-0 | C13H20ClN3O3 |
| Rivaroxaban Impurity 66 | 119835-88-0 | C11H11NO4 |
| Rivaroxaban Impurity 69 | 17249-80-8 | C4H3ClS |
| Rivaroxaban Impurity 69 | 2206135-27-3 | C14H19N3O5 |
| Rivaroxaban Impurity 70 | 2422046-61-3 | C17H16ClN3O4S |
| Rivaroxaban Impurity 73 | 1160170-00-2 | C19H20ClN3O6S |
| Rivaroxaban Impurity 75 | 482305-98-6 | C18H20ClN3O4S |
| Rivaroxaban Impurity 76 | 1327778-39-1 | C13H16N2O4 |
| Rivaroxaban Impurity 77 | 1838139-08-4 | C16H19N3O6 |
| Rivaroxaban Impurity 78 | 1838133-00-8 | C23H21Cl2N3O5S2 |
| Rivaroxaban Impurity 79 | 20406-73-9 | C12H14N2O4 |
| Rivaroxaban Impurity 80 | 1643354-27-1 | C32H30N4O8 |
| Rivaroxaban Impurity 85 | 130155-41-8 | C11H11NO4 |
| Rivaroxaban Impurity 87 | 17249-78-4 | C4HCl3S |
| Rivaroxaban Impurity 88 | 1794804-53-7 | C9H12ClNOS |
| Rivaroxaban Impurity 89 | 19532-96-8 | C16H24N2O2 |
| Rivaroxaban Impurity 90 | 1082495-22-4 | C10H12N2O2 |
| Rivaroxaban Impurity 94 | 62457-35-6 | C11H11NO4 |
| Rivaroxaban Impurity 95 | 1802522-36-6 | C10H16Cl2O3 |
| Rivaroxaban Impurity 96 | 845729-41-1 | C10H10N2O4 |
| Rivaroxaban Impurity 97 | 122-98-5 | C8H11NO |
| Rivaroxaban Impurity 103 | 42518-98-9 | C5H2Cl2OS |
| Rivaroxaban Impurity 121 | 67482-49-9 | C5H2Cl2OS |
| Rivaroxaban impurity A CRS | Not available | C19H18ClN3O5S |
| Rivaroxaban Impurity B | 1365267-35-1 | C29H32N6O9 |
| Rivaroxaban Impurity C | 1415566-28-7 | C19H19N3O5S |
| Rivaroxaban Impurity D | 1770812-37-7 | C19H17Cl2N3O5S |
