| Ramipril Related Compound B | 295328-72-2 | C24H34N2O5 |
| Ramiprilat | 87269-97-4 | C21H28N2O5 |
| Ramiprilat Diketopiperazine | 108736-10-3 | C21H26N2O4 |
| Ramoglitazone impurity 1 | 329045-45-6 | C23H34N2O7 |
| Ranitidine | 66357-35-5 | C13H22N4O3S |
| Ranitidine EP Impurity G | 148639-72-9 | C5H9N3OS |
| Ranitidine EP Impurity I | 207592-21-0 | C27H44N8O6S2 |
| Ranitidine for impurity A identification | 66357-59-3 | C13H23ClN4O3S |
| Ranitidine for impurity A identification | 66357-59-3 | C13H23ClN4O3S |
| Ranitidine Hydrochloride Imp. A (EP): N,N'-Bis[2-[[[5- [(dimethylamino)methyl]furan-2-yl]- methyl]sulphanyl]ethyl]-2-nitroethene- 1,1-diamine | 72126-78-4 | C22H35N5O4S2 |
| Ranitidine Hydrochloride Imp. B (EP) as Hemifumarate: 2-[[[5-[(Dimethylamino)methyl] furan-2-yl]methyl]sulfanyl]ethanamine Hemifumarate | 256948-32-0 | C24H40N4O6S2 |
| Ranitidine Hydrochloride Imp. B (EP): 2-[[[5-[(Dimethylamino)- methyl]furan-2-yl]methyl]sulphanyl]- ethanamine | 66356-53-4 | C10H18N2OS |
| Ranitidine Hydrochloride Imp. C (EP): N-[2-[[[5-[(Dimethylamino)- methyl]furan-2-yl]methyl]sulphinyl]ethyl]- N'-methyl-2-nitroethene-1,1-diamine (Ranitidine Sulphoxide) | 73851-70-4 | C13H22N4O4S |
| Ranitidine Hydrochloride Imp. D (EP) as Sodium Salt: N-[2-[[[5- [(Dimethylamino)methyl]furan-2-yl]- methyl]sulphanyl]ethyl]-2-nitroacetamide Sodium Salt | 112251-56-6 | C12H18N3NaO4S |
| Ranitidine Hydrochloride Imp. E (EP): N-[2-[[[5-[(Dimethyloxidoamino)- methyl]furan-2-yl]methyl]sulphanyl]ethyl]-N'- methyl-2-nitroethene-1,1-diamine (Ranitidine N-Oxide) | 73857-20-2 | C13H22N4O4S |
| Ranitidine Hydrochloride Imp. F (EP) as Hydrochloride: [5-[(Dimethyl- amino)methyl]furan-2-yl]methanol Hydrochloride | 81074-81-9 | C8H14ClNO2 |
| Ranitidine Hydrochloride Imp. G (EP): 3-(Methylamino)-5,6-dihydro- 2H-1,4-thiazin-2-one Oxime | 148639-72-9 | C5H9N3OS |
| Ranitidine Hydrochloride Imp. H (EP): N-Methyl-2-nitroacetamide | 72078-82-1 | C3H6N2O3 |
| Ranitidine Hydrochloride Imp. I (EP): 2,2'-Methylenebis[N-[2-[[[5-[(dimethyl- amino)methyl]furan-2-yl]methyl]sulphanyl]ethyl]-N'- methyl-2-nitroethene-1,1-diamine] | 207592-21-0 | C27H44N8O6S2 |
| Ranitidine Hydrochloride Imp. K (EP): N-Methyl-1-methylthio-2- nitroethenamine ((EZ)-N-Methyl-1-(methyl- sulphanyl)-2-nitroethen-1-amine) | 61832-41-5 | C4H8N2O2S |
| Ranitidine Impurity 1 | 66357-25-3 | C12H20N4O3S |
| Ranitidine Impurity 2 | 73857-20-2 | C13H22N4O4S |
| Ranitidine Impurity 3 | 112251-56-6 | C12H18N3NaO4S |
| Ranitidine Impurity 4 | 256948-32-0 | C24H40N4O6S2 |
| Ranitidine Impurity D | 112251-56-6 | C12H18N3NaO4S |
| Ranitidine Impurity G | 112233-23-5 | C5H10ClN3OS |
| Ranitidine Impurity H | 72078-82-1 | C3H6N2O3 |
| Ranitidine Impurity I | Not available | C27H44N8O6S2 |
| Ranitidine impurity J | 1331637-48-9 | C11H22N6O4S2 |
| Ranitidine Impurity K | 61832-41-5 | C4H8N2O2S |
| Ranitidine N-Oxide | 73857-20-2 | C13H22N4O4S |
| Ranitidine Related Compound C | 73851-70-4 | C13H22N4O4S |
| Ranitidine S-Oxide | 73851-70-4 | C13H22N4O4S |
| Ranitidine Sulfoxide | 73851-70-4 | C13H22N4O4S |
| Ranitidine-N,S-dioxide | 1185237-42-6 | C13H22N4O5S |
| Ranolazine impurity 2 | 2210-74-4 | C10H12O3 |
| Ranolazine impurity 3 | 2731041-97-5 | C24H33N3O5 |
| Ranolazine Impurity 6 | 162712-35-8 | C14H22N2O3 |
| Ranolazine Related Compound A | 2210-74-4 | C10H12O3 |
| Ranolazine Related Compound C | 5294-61-1 | C14H23N3O+2 |
| Ranolazine Related Compound D | 380204-72-8 | C24H32N4O2 |
| Rapamycin (Everolimus EP Impurity A) | 53123-88-9 | C51H79NO13 |
| Rapamycin Impurity 1 | 141392-23-6 | C50H77NO13 |
| Rapamycin Impurity 4 | 151519-50-5 | C50H77NO13 |
| Rapamycin Impurity 5 | 142382-16-9 | C50H77NO13 |
| Rapamycin Impurity 7 | 83482-58-0 | C50H77NO12 |
| Rapamycin Impurity 12 | 156223-31-3 | C50H77NO13 |
| Rapamycin Impurity 15 | 157054-84-7 | C52H81NO13 |
| Rapamycin Impurity 21 | Not available | C51H79NO13 |
| Rapamycin Impurity 23 | 147438-27-5 | C51H79NO13 |
| Rapamycin Impurity 25 | 572924-54-0 | C53H84NO14P |
| Rapamycin Impurity 32 | 851536-75-9 | C55H87NO14 |
| Rapamycin Impurity 34 | 1062645-51-5 | C58H95N2O17P |
| Rapamycin Impurity 35 | 85537-35-5 | C50H77NO12 |
| Rapamycin Impurity 48 | 151945-42-5 | C51H79NO13 |
| Rapamycin Impurity 60 | Not available | C51H79NO13 |
| Rapamycin-31,42-Diester Impurity | Not available | C61H95NO19 |
| Rasagiline impurity 1 | 1175018-75-3 | C12H15Cl2N |
| Rasagiline impurity 2 | 1175018-74-2 | C12H14ClN |
| Rasagiline Impurity 2 | 200628-33-7 | C16H18ClN |
| Rasagiline Impurity 2 (Hydrochloride) | 1175018-80-0 | C12H15Cl2N |
| Rasagiline Impurity 3 | 1175018-79-7 | C12H14ClN |
| Rasagiline impurity 3 (Hydrochloride) | 1175018-78-6 | C12H15Cl2N |
| Rasagiline Impurity 5 | 10277-74-4 | C9H11N |
| Rasagiline Impurity 9 | 1458609-07-8 | C15H15N |
| Rasagiline Impurity 9 | 91639-43-9 | C12H15N |
| Rasagiline Impurity 10 | 34698-41-4 | C9H11N |
| Rasagiline Impurity 11 | 83-33-0 | C9H8O |
| Rasagiline Impurity 13 | 1312077-05-6 | C12H11NO |
| Rasagiline Impurity 15 | 294209-44-2 | C10H13NO2S |
| Rasagiline Impurity 16 | 1276516-51-8 | C9H11NO |
| Rasagiline Impurity 17 | 1276516-71-2 | C12H13NO |
| Rasagiline Impurity 18 | 1276516-73-4 | C12H13NO |
| Rasagiline Impurity 19 | 10305-73-4 | C9H12ClN |
| Rasagiline Impurity 24 | 1875-49-6 | C13H15N |
| Rasagiline Impurity 25 | 1042563-60-9 | C12H14N2 |
| Rasagiline Impurity 27 | 31502-89-3 | C10H11NO |
| Rebamipide Impurity 1 | 100342-53-8 | C18H15ClN2O2 |
| Rebamipide Impurity 2 | 94670-39-0 | C8H6ClNO2 |
| Rebamipide Impurity 4 | 4876-14-6 | C12H13ClN2O3 |
| Rebeprazole Impurity 1 | 1114543-47-3 | C29H36N4O4S |
| Rebeprazole Impurity 8 | 1163685-31-1 | C11H15NO4 |
| Rebeprazole Impurity 11 | 1159977-27-1 | C14H12ClN3O2S |
| Rebeprazole Sodium | 117976-90-6 | C18H20N3NaO3S |
| Reduced Coenzyme Q10 | 992-78-9 | C59H92O4 |
| Reduced Haloperidol | 34104-67-1 | C21H25ClFNO2 |
| Refametinib | 923032-37-5 | C19H20F3IN2O5S |
| Refametinib Impurity 1 | 923032-38-6 | C19H20F3IN2O5S |
| Refametinib Impurity 2 | 923032-36-4 | C19H20F3IN2O5S |
| Regadenoson Impurity 1 | 1423073-21-5 | C15H17N7O6 |
| Regadenoson Impurity 2 | 313348-31-1 | C16H20N8O5 |
| Regadenoson Impurity 3 | 313348-29-7 | C14H15N7O6 |
| Regadenoson Impurity 5 | 146-77-0 | C10H12ClN5O4 |
| Regadenoson Impurity 6 | 313348-16-2 | C16H19N7O6 |
| Regadenoson Impurity 7 | 37622-90-5 | C6H8N2O2 |
| Regadenoson Impurity 9 | 80370-42-9 | C6H8O4 |
| Regadenoson Impurity 12 | 1627202-38-3 | C13H15N7O4 |
| Regadenoson Impurity 13 | 79999-39-6 | C16H18ClN5O7 |
| Regadenoson Impurity 14 | 83124-74-7 | C6H7Cl3O2 |
| Regadenoson Impurity 15 | 10601-80-6 | C9H18O4 |
| Regadenoson Impurity 17 | 1818-71-9 | C10H13N5O5 |
| Regadenoson Impurity 18 | 2096-10-8 | C10H14N6O4 |
| Regadenoson Impurity 19 | 15763-11-8 | C10H15N7O4 |
| Regadenoson Impurity 20 | 313348-33-3 | C16H20N8O5 |
| Regadenoson Impurity 21 | 1702334-23-3 | C10H10N8O |
| Regadenoson Impurity 22 | 765299-55-6 | C16H20N8O5 |
| Regardsone impurity 1 | 2015222-31-6 | C15H18N8O5 |
| Regardsone impurity 10 | 2015222-35-0 | C10H12ClN5O4 |
| Regardsone impurity 15 | 24723-77-1 | C11H15N5O5 |
| Regardsone impurity 20 | 650-51-1 | C2Cl3NaO2 |
| Regardsone impurity 25 | 2156-56-1 | C2HCl2NaO2 |
| Regardsone impurity 26 | 1154383-52-4 | C5H7N3O |
| Regorafenib EP Impurity A | 757251-39-1 | C13H12FN3O2 |
| Regorafenib EP Impurity B | 2141961-84-2 | C15H14FN3O3 |
| Regorafenib EP Impurity D | 2438857-80-6 | C27H22F2N6O5 |
| Regorafenib for FP system suitability | 1019206-88-2 | C21H17ClF4N4O4 |
| Regorafenib Impurity 6 | 1187945-05-6 | C20H12ClF4N3O4 |
| Regorafenib Impurity 7 | 835621-11-9 | C21H15ClF4N4O4 |
| Regorafenib Impurity 9 | 2188236-16-8 | C21H16F4N4O3 |
| Regorafenib Impurity 10 | 2098799-12-1 | C19H17FN4O3 |
| Regorafenib Impurity 13 | 2909-32-2 | C14H14N2O |
| Regorafenib Impurity 14 | 835621-12-0 | C20H13ClF4N4O4 |
| Regorafenib Impurity 15 | 1343498-72-5 | C20H13ClF4N4O3 |
| Regorafenib Impurity 16 | 1343498-71-4 | C21H15ClF4N4O4 |
| Regorafenib Impurity 17 | 2545933-24-0 | C25H22FN5O4 |
| Regorafenib Impurity 18 (Sorafenib Impurity 8) | 1379324-09-0 | C7H6Cl2N2O |
| Regorafenib Impurity 20 | 370-50-3 | C15H8Cl2F6N2O |
| Regorafenib Impurity 27 | 1333390-56-9 | C14H9ClF4N2O2 |
| Regorafenib Impurity 29 | 352277-93-1 | C12H13ClF3NO2 |
| Regorafenib Impurity 30 (Sorafenib Impurity 12) | 1153328-25-6 | C13H13N3O2 |
| Regorafenib Impurity 50 | 6636-55-1 | C7H6ClNO2 |
| Regorafenib Impurity 51 | 98273-19-9 | C7H5Cl2NO2 |
| Regorafenib Impurity 60 | 2232228-54-3 | C27H23ClF4N4O9 |
| Regorafenib Impurity 62 | 1855006-12-0 | C20H18FN5O3 |
| Regorafenib Impurity 63 | 2098799-13-2 | C35H23Cl2F7N6O5 |
| Regorafenib Impurity 67 | 1446410-29-2 | C8H10ClN3O |
| Regorafenib Impurity 74 | 50528-86-4 | C8H3ClF3NO |
| Regorafenib impurity A | 757251-39-1 | C13H12FN3O2 |
| Regorafenib impurity C | Not available | C20H18FN5O3 |
| Regorafenib impurity C | Not available | C21H15ClF4N4O3 |
| Regorafenib impurity D | Not available | C27H22F2N6O5 |
| Regorafenib impurity D | Not available | C9H7ClF3NO2 |
| Regorafenib N-Beta-D-Glucuronide Sodium Salt | Not available | C27H22ClF4N4NaO9 |
| Regorafenib Related Compound A | 757251-39-1 | C13H12FN3O2 |
| rel-10-[(1R,2S)-2,3-Dihydroxy-1-(hydroxymethyl)propyl]-1,4,7,10-tetraazacyclododecane-1,4,7-triacetic Acid | 151852-61-8 | C18H34N4O9 |
| rel-(1R,3S,5S)-8-Methyl-8-azabicyclo[3,2,1]oct-6-en-yl-2-hydroxy-2,2-dithiophen-2-yl acetate | 136310-66-2 | C18H19NO3S2 |
| rel-(1r,4r)-4-cyclobutylcyclohexane-1-carboxylic acid, trans | 1955474-80-2 | C11H18O2 |
| Relibactam | 1174018-99-5 | C12H20N4O6S |
| Relomycin | 1404-48-4 | C46H79NO17 |
| Relugolix | 737789-87-6 | C29H27F2N7O5S |
| Relugolix Impurity 4 | 5469-69-2 | C4H4ClN3 |
| Relugolix Impurity 16 | 2814571-32-7 | C26H24F2N6O4S |
| Relugolix Impurity 17 | 1801551-07-4 | C28H25F2N7O5S |
| Relugolix Impurity 21 | 2814571-34-9 | C29H27F2N7O6S |
| Relugolix Impurity 23 | 1589503-93-4 | C27H24F2N6O3S |
| Relugolix Impurity 24 | 7252-84-8 | C5H7N3O |
| Relugolix Impurity 25 | 2591260-08-9 | C27H29F2N3O6S |
| Relugolix Impurity 27 | 2591260-09-0 | C25H25F2N3O6S |
| Relugolix Impurity 32 | 2754392-26-0 | C26H30FN3O4S |
| Relugolix Impurity 51 | 2767571-66-2 | C26H26F2N6O2S |
| Relugolix Impurity 68 | 2814571-36-1 | C55H46F4N12O7S2 |
| Relugolix Impurity 73 | 2814571-35-0 | C57H49F4N13O9S2 |
| Relugolix Impurity 75 | 2642316-10-5 | C30H31F2N7O6S |
| Relugolix Impurity 81 | 2591260-03-4 | C18H20N2O6S |
| Relugolix Impurity 86 | 593-56-6 | CH6ClNO |
| Relugolix Impurity 88 | 737790-54-4 | C28H25F2N7O5S |
| Relugolix Impurity 93 | 57041-95-9 | C4H5N3O |
| Relugolix Impurity 95 | 6378-51-4 | C3H8N2O3 |
| Relugolix Impurity 96 | 2814571-33-8 | C28H29F2N7O4S |
| Relugolix Impurity 98 | 2410716-32-2 | C25H17F2N5O5S |
| Relugolix Impurity 104 | 2814572-20-6 | C29H29F2N7O6S |
| Relugolix Impurity 105 | 2681381-03-1 | C27H22F2N6O5S |
| Relugolix Impurity 114 | 5669-39-6 | C3H9NO |
| Relugolix Impurity 120 | 61070-99-3 | C4H6N4 |
| Relugolix Impurity 128 | 2766095-68-3 | C27H31F2N3O4S |
| Relugolix Impurity 133 | 2754392-23-7 | C29H32F2N2O6S |
| Relugolix Intermediate 1 | 308831-93-8 | C17H18N2O6S |
| Relugolix Intermediate 2 | 308831-94-9 | C24H22F2N2O6S |
| Relugolix Intermediate 3 | 308831-95-0 | C24H21BrF2N2O6S |
| Relugolix Intermediate 4 | 1589503-97-8 | C26H27F2N3O6S |
| Relugolix Intermediate 5 | 1589503-95-6 | C24H23F2N3O6S |
| Relugolix Intermediate 6 | 174072-89-0 | C14H14N2O4S |
| Relugolix Intermediate 8 | 1589503-96-7 | C27H22F2N6O5S |
| Remdesivir Impurity 1 | 1911578-74-9 | C12H14N5O7P |
| Remifentanil hydrochloride EP impurity A | 72996-78-2 | C16H22N2O3 |
| Remifentanil hydrochloride EP impurity B | 1332691-33-4 | C19H26N2O5 |
| Remifentanil hydrochloride EP impurity E | 2518277-19-3 | C23H32N2O6 |
| Remifentanil hydrochloride EP impurity G | 61085-72-1 | C23H28N2O3 |
| Remifentanil hydrochloride EP impurity H | 968-86-5 | C19H21N3 |
| Remifentanil hydrochloride EP impurity I | 1096-03-3 | C19H23N3O |
| Remifentanil hydrochloride EP impurity J | 61085-60-7 | C20H24N2O2 |
| Remifentanil hydrochloride EP impurity M | 938184-94-2 | C16H21N3O2 |
| Remifentanil hydrochloride EP impurity N | 960122-89-8 | C19H25N3O3 |
| Remifentanil Impurity1 | 113231-29-1 | C12H18N2O |
| Repaglinide Anhydride | Not available | C54H70N4O7 |
| Repaglinide Anhydride | 2727060-89-9 | C54H70N4O7 |
| Repaglinide for system suitability | 135062-02-1 | C27H36N2O4 |
| Repaglinide Imp. B (EP): [3-Ethoxy-4-(ethoxycarbonyl)- phenyl]acetic Acid | 99469-99-5 | C13H16O5 |
| Repaglinide Imp. C (EP) as N-Acetyl-L-glutamate: (1S)-3-Methyl- 1-[2-(piperidin-1-yl)phenyl]butan-1-amine N-Acetyl- L-glutamate | 219921-94-5 | C23H37N3O5 |
| Repaglinide Imp. D (EP): Ethyl 2-Ethoxy-4-[2-[[(1S)-3-methyl-1-[2-(piperidin- 1-yl)phenyl]butyl]amino]-2-oxoethyl]benzoate (Repaglinide Ethyl Ester) | 147770-06-7 | C29H40N2O4 |
| Repaglinide impurity E | 147852-26-4 | C27H36N2O4 |
| Repaglinide impurity E | 147770-08-9 | C29H40N2O4 |
| Repaglinide Isopropyl Ester | Not available | C30H42N2O4 |
| Repaglinide Methyl Ester | 800365-89-3 | C28H38N2O4 |
| Repaglinide Related Compound A | 219921-94-5 | C23H37N3O5 |
| Repaglinide Related Compound B | 99469-99-5 | C13H16O5 |
| Repaglinide Related Compound C | 1803084-79-8 | C30H34N2O4 |
| Repaglinide Related Compound E | 147852-26-4 | C27H36N2O4 |
| Reserpic Acid Methyl Ester | 2901-66-8 | C23H30N2O5 |
| Reserpine Methyl Ester | 2901-66-8 | C23H30N2O5 |
| Reserpine N-Oxide | 474-48-6 | C33H40N2O10 |
| Resmetirom Impurity 3 | 1581304-50-8 | C20H15Cl2N3O3 |
| Retinol impurity 1 | 35031-06-2 | C13H20O |
| Retinol impurity 2 | 66879-87-6 | C33H38P+ |
| Retinol impurity 3 | 79-76-5 | C13H20O |
| Retinol impurity 5 | 22737-96-8 | C20H30O |
| Retinol impurity 6 | 2052-63-3 | C20H30O |
| Retinol impurity 7 | 1331640-07-3 | C20H28O3 |
| Retinol impurity 8 | 22737-97-9 | C20H30O |
| Retinol impurity 9 | 4159-20-0 | C20H26O2 |
| Retinol impurity 11 | 472-87-7 | C20H26O |
| Retinol impurity 12 | 52340-45-1 | C13H20O |
| Retinol impurity 13 | 564-87-4 | C20H28O |
| Rezafungin | 1396640-59-7 | C63H85N8O17+ |
| Rhamnoside | 23202-85-9 | C26H32O11 |
| Rhein | 478-43-3 | C15H8O6 |
| Rhein CRS | 478-43-3 | C15H8O6 |
| Ribavirin 13C5 | 1646818-35-0 | C8H12N4O5 |
| Ribavirin Carboxylic Acid | 39925-19-4 | C8H11N3O6 |
| Ribavirin EP Impurity A | 39925-19-4 | C8H11N3O6 |
| Ribavirin EP Impurity B | 57198-02-4 | C8H12N4O5 |
| Ribavirin EP Impurity C | 4928-87-4 | C3H3N3O2 |
| Ribavirin EP Impurity D | 3641-08-5 | C3H4N4O |
| Ribavirin EP Impurity F | 58151-87-4 | C10H14N4O6 |
| Ribavirin EP Impurity G | 39030-43-8 | C8H12N4O5 |
| Ribavirin Imp. A (EP): 1- -D-Ribofuranosyl-1H-1,2,4- triazole-3-carboxylic Acid | 39925-19-4 | C8H11N3O6 |
| Ribavirin Imp. C (EP): 1H-1,2,4-Triazole-3-carboxylic Acid | 4928-87-4 | C3H3N3O2 |
| Ribavirin Imp. D (EP): 1H-1,2,4-Triazole-3-carboxamide | Not available | C3H4N4O |
| Ribavirin Imp. F (EP): 1-(5-O-Acetyl- -D- ribofuranosyl)-1H-1,2,4-triazole-3- carboxamide (5'-O-Acetylribavirin) | 58151-87-4 | C10H14N4O6 |
| Ribavirin impurity 7 | 23094-61-3 | C13H18O9 |
| Ribavirin impurity 8 | 69855-19-2 | C13H18O9 |
| Ribavirin Impurity 9 | 4928-88-5 | C4H5N3O2 |
| Ribavirin impurity 9 | 40461-89-0 | C5H10O5 |
| Ribavirin impurity 10 | 5536-17-4 | C10H13N5O4 |
| Ribavirin Impurity 10 | 5614-64-2 | C5H5N5O2 |
| Ribavirin impurity 11 | 5682-25-7 | C10H13N5O4 |
| Ribavirin Impurity 11 | 57281-13-7 | C4H5N3O3 |
| Ribavirin Impurity 12 | 799-87-1 | C13H11N2O8P |
| Ribavirin Impurity 12 (6-Acetylaminopurine) | 6034-68-0 | C7H7N5O |
| Ribavirin Impurity 13 | 30747-23-0 | C18H21N5O9 |
