• Radon, isotope of mass226
• 16369-95-2
• Rn
• 226
• .

• Rhenium bromide oxide(ReBr4O)
• 23601-08-3
• Br4O Re
• 245-773-7
• 521.8224
• .

• Rare earth fluorides
• 68188-85-2
• REF3
• 269-166-1
• 0
• .

• RACA 854 (9CI)
• 104558-93-2
• 0
• .

• RNA formation factor(Xanthomonas campestris clone pQDCLP gene clp reduced) (9CI)
• 148349-08-0
• 0
• .

• Rhin ATP (9CI)
• 80106-44-1
• 0
• .

• Riboflavin5'-(trihydrogen diphosphate), P'®5'-ester with 3-(aminocarbonyl)-1-b-D-ribofuranosylpyridinium inner salt (9CI)
• 29161-69-1
• C28H34 N6 O16 P2
• .

• RNA formation factor(Rhodopseudomonas palustris clone pMK406 gene aadR reduced) (9CI)
• 148710-58-1
• 0
• .

• Ruthenium, isotope ofmass 102
• 14914-62-6
• Ru
• 101.9044
• .

• Retinal, 7,8-dihydro-,9-cis-
• 72535-16-1
• C20H30 O
• 0
• .

• RNA formation factor(human gene ilF reduced) (9CI)
• 143298-33-3
• 0
• .

• Ristomycin A aglycone,5,22,31,55-tetrachloro-7-demethyl-64-O-demethyl-56-O-[2-deoxy-2-[(10-methyl-1-oxoundecyl)amino]-b-D-glucopyranosyl]-42-O-a-D-mannopyranosyl-N15-methyl-(9CI)
• 103549-47-9
• C83H88 Cl4 N8 O29
• 0
• .

• RP 6237I (9CI)
• 102696-26-4
• .

• Rifamycin,25-O-deacetyl-1,4-dideoxy-1,4-dihydro-1,4-dioxo-
• 17555-51-0
• C35H43 N O11
• 0
• .

• Rifamycin,3-[[(2-carboxy-2-phenylethoxy)imino]methyl]- (9CI)
• 63950-99-2
• C47H56 N2 O15
• 888.9519
• .

• Ramoplanin A 1 (peptidemoiety), 11-[(2S)-2-[4-(a-D-mannopyranosyloxy)phenyl]glycine]- (9CI)
• 124884-28-2
• C112H142 Cl N21 O35
• 2377.8986
• .

• Rifamycin VIII,1',4-didehydro-1-deoxy-5'-(4-ethyl-1-piperazinyl)-1,4-dihydro-3'-hydroxy-1-oxo-
• 143526-65-2
• C49H60 N4 O13
• 913.0197
• .

• RA-octil
• 123060-44-6
• C₃₅H₅₂N₂O₉
• 0
• .

• Ranakinin (9CI)
• 139446-71-2
• C₆₂H₉₅N₁₇O₁₅S
• 1350.5876
• .

• Rifamycin VIII,1',4-didehydro-1-deoxy-1,4-dihydro-3'-hydroxy-5'-(4-methyl-1-piperazinyl)-1-oxo-
• 105396-59-6
• C48H58 N4 O13
• 898.9931
• .

• RNA formation factorSRp30c (human) (9CI)
• 170974-22-8
• 0
• .

• Rifamycin,N,15-didehydro-15-deoxo-15-methoxy- (9CI)
• 14768-65-1
• C38H47 N O12
• 709.7793
• .

• Retinamide,N-(tetrahydro-2-oxo-3-thienyl)- (9CI)
• 105918-76-1
• C24H33 N O2 S
• 0
• .

• Richenoic acid
• 134476-74-7
• .

• RNA formation factor(Rhodobacter capsulatus clone pRCN200 gene nifR4 reduced) (9CI)
• 123138-90-9
• 0
• .

• Rifamycin VIII,1',4-didehydro-5'-(hexahydro-1H-azepin-1-yl)-1-deoxy-1,4-dihydro-1-oxo- (9CI)
• 105396-33-6
• C49H59 N3 O12
• 882.0057
• .

• RNA formation factor s (Streptomyces coelicolor clonemp18-whiG-I/mp18-whiG-II gene whiG) (9CI)
• 126903-98-8
• 0
• .

• Ruthenium,(amminedichloroplatinum)[m-(1,4-butanediamine-N:N')]dichlorotris[sulfinylbis[methane]-O]-,stereoisomer (9CI)
• 150855-48-4
• C10H33 Cl4 N3 O3 Pt Ru S3
• 0
• .

• Rubiwettin R 1 (9CI)
• 129039-45-8
• 0
• .

• Ribofuranoside, methyl2,3-dideoxy-2,3-epithio-5-O-trityl-, b-D- (8CI)
• 22314-24-5
• C25H24 O3 S
• 404.5213
• .

• Ruthenium(6+),tetradecaamminedi-m-oxotri-, hexachloride, tetrahydrate, stereoisomer (9CI)
• 12506-76-2
• Cl. 1/6 H42 N14 O2 Ru3 . 2/3 H2 O
• 844.3117
• .

• Retinal, 3-hydroxy-,11-cis-
• 102918-00-3
• C20H28 O2
• .

• Rubidium azide (Rb(N3))
• 22756-36-1
• N3Rb
• 127.50
• .

• Renin
• 9015-94-5
• 232-796-2
• 0
• .

• RNA formation factor(Orgyia pseudotsugata nucleopolyhedrovirus clone Op47 gene IE-2 reduced) (9CI)
• 146810-60-8
• 0
• .

• Ruthenium, isotope ofmass 94
• 15125-02-7
• Ru
• 94
• .

• RNA formation factor(Neisseria gonorrhoeae clone pNG58 gene pilB reduced) (9CI)
• 122319-68-0
• 0
• .

• Ristomycin A aglycone,5,22,31,55-tetrachloro-7-demethyl-64-O-demethyl-56-O-[2-deoxy-2-[(1-oxo-4-decenyl)amino]-b-D-glucopyranosyl]-42-O-a-D-mannopyranosyl-N15-methyl- (9CI)
• 105997-86-2
• C81H82 Cl4 N8 O29
• 0
• .

• Rhubarb,ext.
• 8016-55-5
• 0
• .

• Repressor(Acinetobacter calcoaceticus clone pIB1 gene catM reduced) (9CI)
• 126700-73-0
• 0
• .

• Retinoic acid, b-D-glucopyranosyl ester
• 71869-12-0
• C26H38 O7
• 0
• .

• Ristomycin A aglycone,5,31-dichloro-7-demethyl-64-O-demethyl-19-deoxy-N15-methyl- (9CI)
• 114894-40-5
• C59H47 Cl2 N7 O18
• 1212.94658
• .

• Rhenium selenide(ReSe2)
• 12038-64-1
• ReSe2
• 234-879-9
• 344.127
• .

• Ruthenium,dichloro[(1,2,5,6-h)-1,5-cyclooctadiene]-
• 50982-12-2
• C₈H₁₂Cl₂Ru
• 256-889-2
• 276.12512 [g/mol]
• .

• Rhodium, isotope ofmass 106
• 14234-34-5
• Rh
• 106
• .

• Rilanit GMHS
• 1323-43-9
• 0
• .

• Rifamycin,3-[[[2-(1-pyrrolidinyl)ethoxy]imino]methyl]- (9CI)
• 22912-88-5
• C44H59 N3 O13
• 837.9516
• .

• Reprimun
• 41776-67-4
• C₄₆H₅₆N₂O₁₄
• 0
• .

• Rammelsbergite (NiAs2)
• 1303-22-6
• As2Ni
• 0
• .

• Rhenium, ion (Re7+)
• 22541-28-2
• Re
• 186.207
• .