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    Home / RISPERIDONE / Risperidone Impurity (3-Vinyl-6,7,8,9-Tetrahydro-2-Methyl-4H-Pyrido[1,2-a]pyrimidin-4-one)
    Risperidone Impurity (3-Vinyl-6,7,8,9-Tetrahydro-2-Methyl-4H-Pyrido[1,2-a]pyrimidin-4-one)

    Risperidone Impurity (3-Vinyl-6,7,8,9-Tetrahydro-2-Methyl-4H-Pyrido[1,2-a]pyrimidin-4-one)

    Synonym

    2-methyl-3-vinyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one

    Molecular Formula

    C11H14N2O

    Molecular Weight

    190.25

    Catalogue Number

    AR-R01696

    Parent Drug

    RISPERIDONE

    CAS Number

    832747-59-8

    Common Package:10,25,50,100 mg

    Collections: RISPERIDONE

    Category: 832747-59-8 AR-R01696 C11H14N2O RISPERIDONE

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    (2,4-difluorophenyl)(piperidin-4-yl)methanone hydrochloride

    Synonym

    (2,4-difluorophenyl)(piperidin-4-yl)methanone hydrochloride

    Molecular Formula

    C12H13F2NO. HCl

    Molecular Weight

    225.24 36.46

    Catalogue Number

    AR-R01714

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    CAS Number

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    3-(2-chloroethyl)-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one

    Synonym

    3-(2-chloroethyl)-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one

    Molecular Formula

    C11H11ClN2O

    Molecular Weight

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    Catalogue Number

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    (2,5-difluorophenyl)(piperidin-4-yl)methanone hydrochloride

    Synonym

    (2,5-difluorophenyl)(piperidin-4-yl)methanone hydrochloride

    Molecular Formula

    C12H13F2NO

    Molecular Weight

    225.24

    Catalogue Number

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    cis-Risperidone N-Oxide

    Synonym

    Cis-4-(6-fluorobenzo[d]isoxazol-3-yl)-1-(2-(2-methyl-4-oxo-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-3-yl)ethyl)piperidine 1-oxide

    Molecular Formula

    C23H27FN4O3

    Molecular Weight

    426.49

    Catalogue Number

    AR-R01711

    Parent Drug

    RISPERIDONE

    CAS Number

    1894509-66-0
    trans-Risperidone N-Oxide

    Synonym

    Trans-4-(6-fluorobenzo[d]isoxazol-3-yl)-1-(2-(2-methyl-4-oxo-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-3-yl)ethyl)piperidine 1-oxide

    Molecular Formula

    C23H27FN4O3

    Molecular Weight

    426.49

    Catalogue Number

    AR-R01710

    Parent Drug

    RISPERIDONE

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    3-(2-hydroxyethyl)-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one

    Synonym

    3-(2-hydroxyethyl)-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one

    Molecular Formula

    C11H16N2O2

    Molecular Weight

    208.26

    Catalogue Number

    AR-R01709

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    RISPERIDONE

    CAS Number

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    (S)-9-Hydroxy Risperidone-d4 ((S)-Paliperidone-d4)

    Synonym

    (S)-3-(2-(4-(6-fluorobenzo[d]isoxazol-3-yl)piperidin-1-yl)ethyl)-9-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one-D4

    Molecular Formula

    C23H23FN4O3D4

    Molecular Weight

    430.52

    Catalogue Number

    AR-R01708

    Parent Drug

    RISPERIDONE

    CAS Number

    147663-01-2 (non-labelled)
    (R)-9-Hydroxy Risperidone-d4 ((R)-Paliperidone-d4))

    Synonym

    (R)-3-(2-(4-(6-fluorobenzo[d]isoxazol-3-yl)piperidin-1-yl)ethyl)-9-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one-D4

    Molecular Formula

    C23H23FN4O3D4

    Molecular Weight

    430.52

    Catalogue Number

    AR-R01707

    Parent Drug

    RISPERIDONE

    CAS Number

    130049-85-3 (non-labelled)
    Risperidone EP Impurity L

    Synonym

    3-(2-chloroethyl)-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one

    Molecular Formula

    C11H15ClN2O

    Molecular Weight

    226.71

    Catalogue Number

    AR-R01706

    Parent Drug

    RISPERIDONE

    CAS Number

    63234-80-0
    Risperidone Pyrimidinone N-Oxide

    Synonym

    3-(2-(4-(6-fluorobenzo[d]isoxazol-3-yl)piperidin-1-yl)ethyl)-2-methyl-4-oxo-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidine 1-oxide

    Molecular Formula

    C23H27FN4O3

    Molecular Weight

    426.50

    Catalogue Number

    AR-R01705

    Parent Drug

    RISPERIDONE

    CAS Number

    1301724-91-3
    Risperidone EP Impurity B

    Synonym

    (Z)-3-(2-(4-((2,4-difluorophenyl)(hydroxyimino)methyl)piperidin-1-yl)ethyl)-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one

    Molecular Formula

    C23H28F2N4O2

    Molecular Weight

    430.50

    Catalogue Number

    AR-R01704

    Parent Drug

    RISPERIDONE

    CAS Number

    132961-05-8
    Risperidone Related Compound HCl (3-(4-Piperidyl)-1,2-Benzisoxazole HCl)

    Synonym

    3-(piperidin-4-yl)benzo[d]isoxazole

    Molecular Formula

    C12H14N2O. HCl

    Molecular Weight

    202.26 36.46

    Catalogue Number

    AR-R01703

    Parent Drug

    RISPERIDONE

    CAS Number

    84163-68-8
    5,6,7,8-Tetradehydro Risperidone

    Synonym

    3-(2-(4-(6-fluorobenzo[d]isoxazol-3-yl)piperidin-1-yl)ethyl)-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one

    Molecular Formula

    C23H23FN4O2

    Molecular Weight

    406.46

    Catalogue Number

    AR-R01702

    Parent Drug

    RISPERIDONE

    CAS Number

    108855-18-1
    6-fluoro-3-(1,2,3,6-tetrahydropyridin-4-yl)benzo[d]isoxazole

    Synonym

    6-fluoro-3-(1,2,3,6-tetrahydropyridin-4-yl)benzo[d]isoxazole

    Molecular Formula

    C12H11FN2O

    Molecular Weight

    218.23

    Catalogue Number

    AR-R01701

    Parent Drug

    RISPERIDONE

    CAS Number

    439082-09-4
    Risperidone EP Impurity A

    Synonym

    (E)-3-(2-(4-((2,4-difluorophenyl)(hydroxyimino)methyl)piperidin-1-yl)ethyl)-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one

    Molecular Formula

    C23H28F2N4O2

    Molecular Weight

    430.50

    Catalogue Number

    AR-R01700

    Parent Drug

    RISPERIDONE

    CAS Number

    691007-09-7
    Risperidone Metabolite

    Synonym

    3-(2-(4-(4-fluoro-2-hydroxybenzoyl)piperidin-1-yl)ethyl)-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one

    Molecular Formula

    C23H28FN3O3

    Molecular Weight

    413.49

    Catalogue Number

    AR-R01699

    Parent Drug

    RISPERIDONE

    CAS Number

    152542-00-2
    Risperidone Quaternary Salt

    Synonym

    4-(6-fluorobenzo[d]isoxazol-3-yl)-1,1-bis(2-(2-methyl-4-oxo-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-3-yl)ethyl)piperidin-1-ium

    Molecular Formula

    C34H42FN6O3

    Molecular Weight

    601.75

    Catalogue Number

    AR-R01698

    Parent Drug

    RISPERIDONE

    CAS Number

    N/A
    Risperidone EP Impurity K (Desfluoro Risperidone)

    Synonym

    3-(2-(4-(benzo[d]isoxazol-3-yl)piperidin-1-yl)ethyl)-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one

    Molecular Formula

    C23H28N4O2

    Molecular Weight

    392.51

    Catalogue Number

    AR-R01697

    Parent Drug

    RISPERIDONE

    CAS Number

    106266-09-5
    Risperidone EP Impurity I

    Synonym

    3-(2-(4-(4-fluoro-2-(4-(6-fluorobenzo[d]isoxazol-3-yl)piperidin-1-yl)benzoyl)piperidin-1-yl)ethyl)-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one

    Molecular Formula

    C35H39F2N5O3

    Molecular Weight

    615.73

    Catalogue Number

    AR-R01695

    Parent Drug

    RISPERIDONE

    CAS Number

    1329796-66-8
    Risperidone N-Oxide

    Synonym

    4-(6-fluorobenzo[d]isoxazol-3-yl)-1-(2-(2-methyl-4-oxo-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-3-yl)ethyl)piperidine 1-oxide

    Molecular Formula

    C23H27FN4O3

    Molecular Weight

    426.50

    Catalogue Number

    AR-R01694

    Parent Drug

    RISPERIDONE

    CAS Number

    832747-55-4
    Risperidone EP Impurity E

    Synonym

    3-(2-(4-(6-fluorobenzo[d]isoxazol-3-yl)piperidin-1-yl)ethyl)-2,6-dimethyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one

    Molecular Formula

    C24H29FN4O2

    Molecular Weight

    424.52

    Catalogue Number

    AR-R01693

    Parent Drug

    RISPERIDONE

    CAS Number

    1346602-28-5
    Risperidone EP Impurity D

    Synonym

    3-(2-(4-(5-fluorobenzo[d]isoxazol-3-yl)piperidin-1-yl)ethyl)-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one

    Molecular Formula

    C23H27FN4O2

    Molecular Weight

    410.49

    Catalogue Number

    AR-R01692

    Parent Drug

    RISPERIDONE

    CAS Number

    1199589-74-6
    9-Keto Risperidone

    Synonym

    3-(2-(4-(6-fluorobenzo[d]isoxazol-3-yl)piperidin-1-yl)ethyl)-2-methyl-7,8-dihydro-4H-pyrido[1,2-a]pyrimidine-4,9(6H)-dione

    Molecular Formula

    C23H25FN4O3

    Molecular Weight

    424.48

    Catalogue Number

    AR-R01691

    Parent Drug

    RISPERIDONE
    Bicyclo Risperidone

    Synonym

    3-(4-fluoro-2-hydroxyphenyl)-1-(2-(2-methyl-4-oxo-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-3-yl)ethyl)-1,2-diazabicyclo[2.2.2]oct-2-en-1-ium iodide

    Molecular Formula

    C23H28FN4O2. I

    Molecular Weight

    411.50 126.91

    Catalogue Number

    AR-R01690

    Parent Drug

    RISPERIDONE
    6-Desfluoro-6-Hydroxy Risperidone

    Synonym

    3-(2-(4-(6-hydroxybenzo[d]isoxazol-3-yl)piperidin-1-yl)ethyl)-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one

    Molecular Formula

    C23H28N4O3

    Molecular Weight

    408.50

    Catalogue Number

    AR-R01689

    Parent Drug

    RISPERIDONE

    CAS Number

    106266-11-9
    Risperidone EP Impurity F

    Synonym

    2-(2-methyl-4-oxo-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-3-yl)ethyl 4-(6-fluorobenzo[d]isoxazol-3-yl)piperidine-1-carboxylate

    Molecular Formula

    C24H27FN4O4

    Molecular Weight

    454.50

    Catalogue Number

    AR-R01688

    Parent Drug

    RISPERIDONE

    CAS Number

    1346603-86-8
    Risperidone EP Impurity H

    Synonym

    3-(2-(4-(2,4-difluorobenzoyl)piperidin-1-yl)ethyl)-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one

    Molecular Formula

    C23H27F2N3O2

    Molecular Weight

    415.48

    Catalogue Number

    AR-R01687

    Parent Drug

    RISPERIDONE

    CAS Number

    158697-67-7
    (S)-9-Hydroxy Risperidone ((S)-Paliperidone)

    Synonym

    (S)-3-(2-(4-(6-fluorobenzo[d]isoxazol-3-yl)piperidin-1-yl)ethyl)-9-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one

    Molecular Formula

    C23H27FN4O3

    Molecular Weight

    426.50

    Catalogue Number

    AR-R01686

    Parent Drug

    RISPERIDONE

    CAS Number

    147663-01-2
    (R)-9-Hydroxy Risperidone ((R)-Paliperidone)

    Synonym

    (R)-3-(2-(4-(6-fluorobenzo[d]isoxazol-3-yl)piperidin-1-yl)ethyl)-9-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one

    Molecular Formula

    C23H27FN4O3

    Molecular Weight

    426.50

    Catalogue Number

    AR-R01685

    Parent Drug

    RISPERIDONE

    CAS Number

    130049-85-3
    Paliperidone N-Oxide

    Synonym

    4-(6-fluorobenzo[d]isoxazol-3-yl)-1-(2-(9-hydroxy-2-methyl-4-oxo-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-3-yl)ethyl)piperidine 1-oxide

    Molecular Formula

    C23H27FN4O4

    Molecular Weight

    442.49

    Catalogue Number

    AR-R01684

    Parent Drug

    RISPERIDONE

    CAS Number

    761460-08-6
    Risperidone EP Impurity B (Mixture of E and Z Isomers)

    Synonym

    3-(2-(4-((2,4-difluorophenyl)(hydroxyimino)methyl)piperidin-1-yl)ethyl)-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one

    Molecular Formula

    C23H28F2N4O2

    Molecular Weight

    430.50

    Catalogue Number

    AR-R01683

    Parent Drug

    RISPERIDONE

    CAS Number

    158697-66-6
    Risperidone EP Impurity J

    Synonym

    (Z)-3-(2-(4-((4-fluoro-2-(4-(6-fluorobenzo[d]isoxazol-3-yl)piperidin-1-yl)phenyl)(hydroxyimino)methyl)piperidin-1-yl)ethyl)-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one

    Molecular Formula

    C35H40F2N6O3

    Molecular Weight

    630.74

    Catalogue Number

    AR-R01682

    Parent Drug

    RISPERIDONE
    7-Hydroxy risperidone-d4

    Synonym

    3-(2-(4-(6-fluorobenzo[d]isoxazol-3-yl)piperidin-1-yl)ethyl)-7-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one-D4

    Molecular Formula

    C23H23D4FN4O3

    Molecular Weight

    430.52

    Catalogue Number

    AR-R01681

    Parent Drug

    RISPERIDONE

    CAS Number

    147663-04-5
    7-Hydroxy risperidone

    Synonym

    3-(2-(4-(6-fluorobenzo[d]isoxazol-3-yl)piperidin-1-yl)ethyl)-7-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one

    Molecular Formula

    C23H27FN4O3

    Molecular Weight

    426.50

    Catalogue Number

    AR-R01680

    Parent Drug

    RISPERIDONE

    CAS Number

    147663-04-5
    Paliperidone-d4 (9-Hydroxy Risperidone-d4, Risperidone EP Impurity C-d4)

    Synonym

    3-(2-(4-(6-fluorobenzo[d]isoxazol-3-yl)piperidin-1-yl)ethyl)-9-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one-D4

    Molecular Formula

    C23H23FN4O3D4

    Molecular Weight

    430.52

    Catalogue Number

    AR-R01679

    Parent Drug

    RISPERIDONE

    CAS Number

    1020719-55-4
    Paliperidone (9-Hydroxy Risperidone, Risperidone EP Impurity C)

    Synonym

    3-(2-(4-(6-fluorobenzo[d]isoxazol-3-yl)piperidin-1-yl)ethyl)-9-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one

    Molecular Formula

    C23H27FN4O3

    Molecular Weight

    426.49

    Catalogue Number

    AR-R01678

    Parent Drug

    RISPERIDONE

    CAS Number

    144598-75-4
    Risperidone-d4

    Synonym

    3-(2-(4-(6-fluorobenzo[d]isoxazol-3-yl)piperidin-1-yl)ethyl)-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one-D4

    Molecular Formula

    C23H23D4FN4O2

    Molecular Weight

    414.52

    Catalogue Number

    AR-R01677

    Parent Drug

    RISPERIDONE

    CAS Number

    1020719-76-9
    Risperidone

    Synonym

    3-(2-(4-(6-fluorobenzo[d]isoxazol-3-yl)piperidin-1-yl)ethyl)-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one

    Molecular Formula

    C23H27FN4O2

    Molecular Weight

    410.50

    Catalogue Number

    AR-R01676

    Parent Drug

    RISPERIDONE

    CAS Number

    106266-06-2