| 5725-91-7 | RESORUFIN ETHYL ETHER | C14H11NO3 |
| 18268-34-3 | Rubidium, isotope of mass 81 | Rb |
| 2804-00-4 | Roxoperone | C19H23 F N2 O3 |
| 91728-12-0 | robustoxin | C206H313 N59 O59 S9 |
| 53716-44-2 | rociverine | C20H37 N O3 |
| 6808-63-5 | Rotundine | C19H21NO4 |
| 42597-57-9 | Ronifibrate | C19H20 Cl N O5 |
| 12226-48-1 | Reactive Yellow 18 | Unspecified |
| 11031-38-2 | rubradirin | C48H46 N4 O20 |
| 161279-75-0 | Russtoxin (9CI) |
| 12226-59-4 | Reactive yellow 35 |
| 68201-59-2 | Resin acids and Rosin acids, fumarated, sodium salt |
| 107028-82-0 | Reactive orange 95 |
| 11113-83-0 | Roridin |
| 122320-73-4 | Rosiglitazone | C18H19N3O3S |
| 126098-84-8 | RNA1 protein (fungal) |
| 79-81-2 | Retinol palmitate | C36H60O2 |
| 85247-77-4 | Ronipamil | C32H48 N2 |
| 141-84-4 | Rhodanine | C3H3NOS2 |
| 128559-51-3 | RAG-1 protein |
| 106017-08-7 | Rufloxacin hydrochloride | C17H18FN3O3S.HCl |
| 1406-72-0 | Restrictocin |
| 194413-70-2 | RU 24782 |
| 92071-51-7 | Rotraxate | C17H23 N O3 |
| 109974-22-3 | regelinol | C31H48 O5 |
| 161811-54-7 | Reclin HX 4 |
| 7790-29-6 | Rubidium iodide | IRb |
| 6184-17-4 | riboflavin-5'-phosphate sodium salt dihydrate | C17H24N4NaO11P |
| 83-79-4 | ROTENONE | C23H22O6 |
| 125360-61-4 | ribosomal protein L21 |
| 158876-82-5 | Rupatadine fumarate | C26H26ClN3 |
| 76168-82-6 | Ramoplanin | C106H170ClN21O30 |
| 93820-51-0 | Retinol, 7,10-dihydro-10-hydroxy-, acetate | C22H34O3 |
| 483-04-5 | Raubasine | C21H24N2O3 |
| 5092-14-8 | Rotundiogenin B |
| 26657-13-6 | Rolitetracycline nitrate [USAN:JAN] | C54H74N8O25 |
| 89781-55-5 | rolafagrel | C14H12 N2 O2 |
| 107283-03-4 | rubomycin 13-cyclohexylidenehydrazone |
| 38750-15-1 | Rutecarpane |
| 19875-60-6 | R-(+)-LISURIDE HYDROGEN MALEATE | C20H26N4O•C4H4O4 |
| 4148-16-7 | Ritrosulfan | C10H24 N2 O8 S2 |
| 297-90-5 | racemorphan | C17H23 N O |
| 50-55-5 | Reserpine | C33H40N2O9 |
| 17029-21-9 | RHENIUM HEPTAFLUORIDE | F7Re |
| 2763-20-4 | Rhodexin | C23H32 O4 |
| 6812-78-8 | RHODINOL | C10H20O |
| 93361-65-0 | rishirilide A | C21H24 O7 |
| 196488-72-9 | Ribonuclease (Rana pipiens) |
| 91421-42-0 | Rubitecan | C20H15N3O6 |
| 157381-54-9 | RPI 856 A | C43H61 N7 O13 |
| 14391-63-0 | Rubidium, isotope ofmass 82 | Rb |
| 87333-19-5 | Ramipril | C23H32N2O5 |
| 14835-02-0 | RADON219 | Rn |
| 117976-90-6 | Rebeprazole sodium | C18H20N3NaO3S |
| 8050-09-7 | Rosin | Unspecified |
| 81110-73-8 | Racecadotril | C21H23NO4S |
| 106266-06-2 | Risperidone | C23H27FN4O2 |
| 91374-21-9 | Ropinirole | C16H24N2O |
| 168273-06-1 | Rimonabant | C22H21Cl3N4O |
| 5471-51-2 | Raspberry ketone | C10H12O2 |
| 147118-40-9 | Rosuvastatin methyl ester | C23H30FN3O6S |
| 851443-04-4 | Rosuvastatin ethyl ester | C24H32FN3O6S |
| 20283-92-5 | Rosmarinic acid | C18H16O8 |
| 127-47-9 | Retinyl acetate | C22H32O2 |
| 517-51-1 | Rubrene | C42H28 |
| 25546-65-0 | RIBOSTAMYCIN SULFATE SALT | C17H34 N4 O10 |
| 8007-01-0 | Rose oil |
| 91374-20-8 | Ropinirole hydrochloride | C16H24N2O.ClH |
| 5718-83-2 | Rhodanine-3-acetic acid | C5H5NO3S2 |
| 153-18-4 | Rutin | C27H30O16 |
| 54417-53-7 | R-Tetrahydropapaverine | C20H25NO4 |
| 132907-72-3 | Ramosetron hydrochloride | C17H18ClN3O |
| 14897-39-3 | Rifamycin sodium salt | C37H46NNaO12 |
| 85409-38-7 | Rilmenidine phosphate | C10H16N2O.H3O4P |
| 137464-43-8 | red pigment, vision |
| 108-46-3 | Resorcinol | C6H6O2 |
| 13392-28-4 | Rimantadine | C12H21N |
| 22662-39-1 | Rafoxanide | C19H11Cl2I2NO3 |
| 112101-81-2 | R-(-)-5-(2-Amino-propyl)-2-methoxy-benzenesulfonamide | C10H16N2O3S |
| 96563-00-7 | Rohdei-litorin | C51H69N13O11S |
| 130-40-5 | Riboflavin-5-phosphate sodium | C17H21 N4 O9 P . Na |
| 854056-07-8 | Ropivacaine mesylate | C17H26N2O.CH4O3S |
| 132112-35-7 | Ropivacaine hydrochloride | C17H29ClN2O2 |
| 13292-46-1 | Rifampicin | C43H58N4O12 |
| 20765-98-4 | Rhodium (III) chloride trihydrate | Cl3Rh . x H2O |
| 14898-67-0 | Ruthenium(III) chloride | RuCl3.xH2O |
| 73482-96-9 | Rhodium(II) octanoate dimer | C32H60O8Rh2 |
| 13573-17-6 | REINECKE SALT | C4H6 Cr N6 S4 . H4 N . H2 O |
| 114247-09-5 | R-(-)-Fluoxetine hydrochloride | C17H18F3NO.ClH |
| 871038-72-1 | Raltegravir potassium | C20H21FN6O5.K |
| 924663-37-6 | Rebeprazole sulfone N-oxide | C18H21 N3 O5 S |
| 13465-43-5 | Rhodium(III) nitrate dihydrate | Rh(NO3)3.2H2O |
| 12036-35-0 | Rhodium oxide | Rh2O3 |
| 63231-63-0 | Ribonucleic acid |
| 302543-62-0 | Rosiglitazone hydrochloride | C18H19N3O3S.HCl |
| 13446-74-7 | Rubidium fluoride | FRb |
| 72196-32-8 | Ruthenium acetate | C6H9O6Ru |
| 12036-10-1 | Ruthenium dioxide | O2Ru |
| 34513-98-9 | Ruthenium nitrosyl nitrate | N4O10Ru |
| 32740-79-7 | Ruthenium(IV) oxide hydrate | H2O . x O2 Ru |