• Riboflavin,2',3',4',5'-tetrabutanoate
• 752-56-7
• C33H44 N4 O10
• 212-034-5
• 656.73
• .

• Rhamnus purshiana, ext.
• 84650-55-5
• 283-515-5
• 0
• .

• Residues (petroleum),vacuum distn. residue hydrogenation
• 100684-40-0
• 309-713-4
• .

• Rifamycin VIII,1',4-didehydro-1-deoxy-3'-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-1,4-dihydro-1-oxo-
• 143526-61-8
• C49H62 N2 O13 Si
• 915.1077
• .

• Receptor (human clone39K gene MPL precursor reduced) (9CI)
• 147603-79-0
• 0
• .

• RNA formation factor(plasmid pRL1J1 clone pIJ1742 gene rhiR reduced) (9CI)
• 147388-37-2
• 0
• .

• Rhodium(1+),dichlorobis(1,2-ethanediamine-N,N')-, chloride, (OC-6-22)- (9CI)
• 15444-62-9
• C4H16 Cl2 N4 Rh . Cl
• 239-460-4
• 329.46114
• .

• Resin acids,hydrogenated, esters with glycerol
• 96638-33-4
• C₇H₉ClO₂
• 0
• .

• Rifamycin,3-[[[2-(1-piperidinyl)ethoxy]imino]methyl]- (9CI)
• 22912-87-4
• C45H61 N3 O13
• 851.9781
• .

• Retinoic acid,13-(3-carboxyphenyl)-, 13-cis-
• 141948-79-0
• C27H32 O4
• 420.5406
• .

• Ranatensin (8CI,9CI)
• 29451-71-6
• C₆₁H₈₄N₁₆O₁₃S
• 1281.4841
• .

• RNA formation factor(Saccharomyces cerevisiae clone pBRSTP1 gene STP1 reduced) (9CI)
• 147478-47-5
• 0
• .

• RIFABUTIN
• 76609-88-6
• C₄₆H₆₂N₄O₁₁
• 847.0047
• .

• Rifamycin VIII,5'-[bis(2-methoxyethyl)amino]-1',4-didehydro-1-deoxy-1,4-dihydro-3'-hydroxy-1-oxo-(9CI)
• 148235-95-4
• C49H61 N3 O15
• 932.0197
• .

• RNA formation factor BF1 (rat reduced) (9CI)
• 147604-79-3
• 0
• .

• Retinol, 15-(dihydrogenphosphate)
• 53859-19-1
• C20H31 O4 P
• 0
• .

• Ruthenium,trihydroxynitrosyl-
• 14586-51-7
• H3N O4 Ru
• 238-626-3
• 182.09812
• .

• Ribitol,1-amino-1-deoxy-
• 51108-70-4
• C5H13 N O4
• .

• Rhodium,trichlorotris[1,1'-thiobis[butane]]-
• 55425-73-5
• C24H54 Cl3 Rh S3
• 259-633-8
• 648.15
• .

• Rifamycin,3-(4-morpholinyl)- (9CI)
• 16286-09-2
• C41H54 N2 O13
• 782.8731
• .

• Rifamycin VIII,1',4-didehydro-1-deoxy-3'-(diethylamino)-1,4-dihydro-1-oxo- (9CI)
• 105396-16-5
• C47H57 N3 O12
• 855.9684
• .

• Rhodium,trichlorotris(pyridine)-
• 15617-30-8
• C15H15 Cl3 N3 Rh
• 473.59
• .

• Rhodate(2-),pentabromo-, disodium (9CI)
• 94022-49-8
• Br5Rh . 2 Na
• 301-546-5
• 1050.83054
• .

• Rhodamine B isothiocyanate
• 944130-99-8
• C₂₉H₃₀ClN₃O₃S
• 253-248-9
• 500.63
• .

• RNA formation factorGBF 1 (Arabidopsis thaliana clone pGBF1 G box-binding subunit) (9CI)
• 147386-90-1
• 0
• .

• Rhenium fluoride (ReF3)(8CI,9CI)
• 25605-13-4
• F3Re
• 247-124-3
• 243.2022096
• .

• Ryoto Sugar Ester P 599
• 26446-38-8
• C₂₈H₅₄O₁₃
• 247-706-7
• 598.7206
• .

• R-8231
• 50648-52-7
• C₁₃H₁₁BrN₂O₄S
• 0
• .

• RNA formation factorBTEB (rat clone lBP26-5'-1/lBP26-3' reduced) (9CI)
• 148686-29-7
• 0
• .

• RNA formation factor(Saccharomyces cerevisiae clone YCp315-ACR1 gene ACR1 reduced) (9CI)
• 149223-66-5
• 0
• .

• Rhenium oxide (Re2O7)
• 148054-99-3
• O7Re2
• 484.4098
• .

• Rubidium, isotope ofmass 86
• 14932-53-7
• Rb
• 0
• .

• Riboflavin,3-(carboxymethyl)- (9CI)
• 28714-80-9
• C19H22 N4 O8
• 0
• .

• Riboflavin5'-(trihydrogen diphosphate) (9CI)
• 14985-41-2
• C17H22 N4 O12 P2
• 0
• .

• Radon, isotope of mass222
• 14859-67-7
• Rn
• 233-146-0
• 0
• .

• Reductase, nitrate(cytochrome)
• 9029-42-9
• 0
• .

• ruthenium(+3) cation heptaacetate
• 55466-76-7
• C₁₄H₂₁O₁₄Ru₃+₂
• 259-653-7
• 716.517
• .

• RNA formation factorHNF 1 (rat clone l18/l16 protein moiety reduced) (9CI)
• 126548-29-6
• 0
• .

• Rhodium(3+),tris(1,2-propanediamine-kN,kN')-, trichloride (9CI)
• 14175-72-5
• C9H30 N6 Rh . 3 Cl
• 431.6392
• .

• Ruthenium(2+),hexaammine-, (OC-6-11)-
• 19052-44-9
• H18N6 Ru
• 0
• .

• Rhodium,(2,4-pentanedionato-O,O')bis[(1,2-h)-1-propene]- (9CI)
• 12282-38-1
• C11H19 O2 Rh
• .

• Retin,15-(hexadecyloxy)- (9CI)
• 85563-59-3
• C36H62 O
• 0
• .

• Rebif
• 220581-49-7
• .

• RNA formation factorOct 3B (human clone lKHO-4 reduced) (9CI)
• 149086-19-1
• 0
• .

• Rhatany, Krameriatriandra, ext.
• 84775-95-1
• 283-919-1
• 0
• .

• Rhodium(1+),dichlorotetrakis(4-ethylpyridine)-, chloride, (OC-6-12)- (9CI)
• 22933-77-3
• C28H36 Cl2 N4 Rh . Cl
• 0
• .

• Ruthenium,tris(1,1,1-trifluoro-2,4-pentanedionato-kO,kO')- (9CI)
• 16702-38-8
• C15H12 F9 O6 Ru
• 240-753-4
• 563.3316
• .

• RNA formation factor(Saccharomyces cerevisiae clone pHIR2 gene HIR2 reduced) (9CI)
• 149720-55-8
• 0
• .

• Repressor D (plasmid F)(9CI)
• 107371-48-2
• 0
• .

• Ribitol, 1-(dihydrogenphosphate)
• 3506-18-1
• C5H13 O8 P
• 0
• .