USP Raloxifene Hydrochloride RS.
USP Ramipril RS
.
USP Ramipril Related Compound A RS
[(2S,3aS,6aS)-1-[(S)2-[[(S)1-(methoxycarbonyl)-3-phenylpropyl]amino]-1-oxopropyl]-octahydrocyclopenta[b]pyrrole-2-carboxylic acid]
(C22H30N2O5 
402.48)
.
USP Ramipril Related Compound B RS
[(2S,3aS,6aS)-1-[(S)2-[[(S)1-(methylethoxy)carbonyl-3-phenylpropyl]amino]-1-oxopropyl]-octahydrocyclopenta[b]pyrrole-2-carboxylic acid]
(C24H34N2O5
430.54)
.
USP Ramipril Related Compound C RS
[(2S,3aS,6aS)-1-[(S)2-[[(S)1-ethoxycarbonyl-3-cyclohexyl propyl]amino]-1-oxopropyl]-octahydrocyclopenta[b]pyrrole-2-carboxylic acid]
(C23H38N2O5
422.56)
.
USP Ramipril Related Compound D RS
[ethyl (2S)2-[(3S,5aS,8aS, 9aS)-3-methyl-1,4-dioxodecahydro-1H-cyclopenta[e]pyrrolo[1,2-a]pyrazin-2-yl]-4-phenyl-butanoate] Ramipril Diketopiperazine
(C23H30N2O4
398.50)
.
USP Ranitidine Hydrochloride RS
.
USP Ranitidine Related Compound A RS
[5-[[(2-aminoethyl)thio]methyl]-N,N-dimethyl-2-furanmethanamine, hemifumarate salt]
.
USP Ranitidine Related Compound B RS
[N,N¢-bis[2-[[[5-[(dimethylamino)methyl]-2-furanyl]methyl]thio]ethyl]-2-nitro-1,1-ethenediamine]
.
USP Ranitidine Related Compound C RS
[N-[2-[[[5-[(dimethylamino)methyl]-2-furanyl]methyl]sulfinyl]ethyl]-N-methyl-2-nitro-1,1-ethenediamine]
.
USP Ranitidine Resolution Mixture RS—
It is a mixture of ranitidine hydrochloride and four related impurities: ranitidine-N-oxide, ranitidine complex nitroacetamide, ranitidine diamine hemifumarate, and ranitidine amino alcohol hemifumarate.
Ranitidine-N-oxide: N,N-dimethyl[5-[[[2-[[1-(methylamino)-2-nitroethenyl]amino]ethyl]sulphanyl]methyl]furan-2-yl]methanamine N-oxide.
Ranitidine complex nitroacetamide: N-[2-[[[5-[(dimethylamino)methyl]furan-2-yl]methyl]sulphanyl]ethyl]-2-nitroacetamide.
Ranitidine diamine hemifumarate (related compound A): [5-[[(2-aminoethyl)thio]methyl]-N,N-dimethyl-2-furanmethanamine, hemifumarate salt].
Ranitidine amino alcohol hemifumarate: [5-[(dimethylamino)methyl]furan-2-yl]methanol.
USP Rauwolfia Serpentina RS .
USP Repaglinide RS
.
USP Repaglinide Related Compound A RS
[(S)-3-methyl-1-[2-(1-piperidinyl)phenyl]butylamine, N-acetyl-l-glutamate salt]
(C16H26N2·C7H11NO5
435.6)
.
USP Repaglinide Related Compound B RS
[3-ethoxy-4-ethoxycarbonylphenylacetic acid]
(C13H16O5
252.27)
.
USP Repaglinide Related Compound C RS
[(S)-2-ethoxy-4-[2-[[2-phenyl-1-[2-(1-piperidinyl)phenyl]ethyl]amino]-2-oxoethyl]benzoic acid]
(C30H34N2O4
486.61)
.
USP Reserpine RS
.
USP Resorcinol RS
.
USP Ribavirin RS
.
USP Riboflavin RS
.
USP Rifabutin RS
.
USP Rifampin RS
.
USP Rifampin Quinone RS .
USP Rimexolone RS
.
USP Risperidone RS
[3-[2-[4-(6-fluoro-1,2-benzisoxazol-3-yl)piperidino]ethyl]-6,7,8,9-tetrahydro-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one]
(410.48 CAS-106266-06-2).
USP Risperidone System Suitability Mixture RS —Contains risperidone and about 0.2% of each of the following:
Z-oxime-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;
9-hydroxyrisperidone-(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;
6-methylrisperidone-(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.
USP Ritodrine Hydrochloride RS
.
USP Ritonavir RS.
USP Ritonavir Related Compounds Mixture RS.
USP Ropivacaine Hydrochloride RS.
USP Ropivacaine Related Compound A RS
[2,6-dimethylaniline hydrochloride]
(C8H12ClN
157.64. CAS-21436-98-6).
USP Ropivacaine Related Compound B RS
[(R)-ropivacaine hydrochloride monohydrate; (R)-(–)-1-propylpiperidene-2-carboxylic acid (2,6-dimethylphenyl)-amide hydrochloride monohydrate]
(C17H26N2O
328.89).
USP Roxarsone RS
.
USP Rutin RS
.