Sildenafil

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    Product Name    : Sildenafil N-Desmethyl Thione Impurity ;  Desmethyl Thiosildenafil ; 5-[2-Ethoxy-5-(1-piperazinylsulfonyl)phenyl]-1,6-dihydro-1-methyl-3-propyl- 7H-pyrazolo[4,3-d]pyrimidine-7-thione | 479073-86-4 

     Code :  
     CAS  479073-86-4
     Formula  C21H28N6O3S2
     M.Wt  476.62
     Category  Sildenafil
    Sildenafil N-Desmethyl Thione Impurity ;  Desmethyl Thiosildenafil ; 5-[2-Ethoxy-5-(1-piperazinylsulfonyl)phenyl]-1,6-dihydro-1-methyl-3-propyl- 7H-pyrazolo[4,3-d]pyrimidine-7-thione | 479073-86-4 
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    Product Name    : Sildenafil N-Desmethyl Metabolite ;N-Desmethyl Sildenafil ; 5-[2-Ethoxy-5-(piperazin-1-yl)sulfonylphenyl]-1-methyl-3-propyl-4H-pyrazolo[5,4-e]pyrimidin-7-one |  139755-82-1 

     Code :  
     CAS  139755-82-1
     Formula  C21H28N6O4S
     M.Wt  460.55
     Category  Sildenafil
    Sildenafil N-Desmethyl Metabolite ;N-Desmethyl Sildenafil ; 5-[2-Ethoxy-5-(piperazin-1-yl)sulfonylphenyl]-1-methyl-3-propyl-4H-pyrazolo[5,4-e]pyrimidin-7-one |  139755-82-1 
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    Product Name    : Sildenafil Lactam Impurity ;  5-(2-Ethoxyphenyl)-1-methyl-3-propyl-1,6-dihydro-7H-pyrazole[4,3-d]pyrimidine-7-one | 139756-21-1

     Code :  
     CAS  139756-21-1
     Formula  C17H20N4O2
     M.Wt  312.37
     Category  Sildenafil
    Sildenafil Lactam Impurity ;   5-(2-Ethoxyphenyl)-1-methyl-3-propyl-1,6-dihydro-7H-pyrazole[4,3-d]pyrimidine-7-one | 139756-21-1
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    Product Name    : Sildenafil Isobutylpyrazolopyrimidine Impurity ; 3-(2-Methylpropyl)-1H-pyrazolo[4,3-d]pyrimidine | 1346600-82-5

     Code :  
     CAS  1346600-82-5
     Formula  C9H12N4
     M.Wt  176.22
     Category  Sildenafil
    Sildenafil Isobutylpyrazolopyrimidine Impurity ; 3-(2-Methylpropyl)-1H-pyrazolo[4,3-d]pyrimidine | 1346600-82-5
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    Product Name    : Sildenafil EP Impurity D ;Desmethylpiperazinyl Sildenafil Sulfonic Acid ; 3-(4,7-Dihydro-1-methyl-7-oxo-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-5-yl)-4-ethoxybenzenesulfonic acid | 1357931-55-5 

     Code :  
     CAS  1357931-55-5
     Formula  C17H20N4O5S
     M.Wt  392.43
     Category  Sildenafil
    Sildenafil EP Impurity D ;Desmethylpiperazinyl Sildenafil Sulfonic Acid ; 3-(4,7-Dihydro-1-methyl-7-oxo-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-5-yl)-4-ethoxybenzenesulfonic acid | 1357931-55-5 
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    Product Name    : Sildenafil EP Impurity C ; O-Desethyl Sildenafil ; 5-[2-Hydroxy-5-(4-methylpiperazinylsulphonyl)phenyl]1-methyl-3-n-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyramidin-7-one | 139755-91-2 

     Code :  
     CAS  139755-91-2
     Formula  C20H26N6O4S
     M.Wt  446.52
     Category  Sildenafil
    Sildenafil EP Impurity C ; O-Desethyl Sildenafil ; 5-[2-Hydroxy-5-(4-methylpiperazinylsulphonyl)phenyl]1-methyl-3-n-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyramidin-7-one | 139755-91-2 
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    Product Name    : Sildenafil EP Impurity B ;Sildenafil N-Oxide ; 5-[2-Ethoxy-5-[(4-methyl-4-oxido-1-piperazinyl)sulfonyl]phenyl]-1,6-dihydro-1-methyl-3-propyl-7H-pyrazolo[4,3-d]pyrimidin-7-one | 1094598-75-0 

     Code :  
     CAS  1094598-75-0
     Formula  C22H30N6O5S
     M.Wt  490.58
     Category  Sildenafil
    Sildenafil EP Impurity B ;Sildenafil N-Oxide ; 5-[2-Ethoxy-5-[(4-methyl-4-oxido-1-piperazinyl)sulfonyl]phenyl]-1,6-dihydro-1-methyl-3-propyl-7H-pyrazolo[4,3-d]pyrimidin-7-one | 1094598-75-0 
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    Product Name    : Sildenafil EP Impurity A ; Sildenafil USP RC A ; Sildenafil Isobutyl Analog ; 5-[2-Ethoxy-5-[(4-methyl-4-oxido-1-piperazinyl)sulfonyl]phenyl]-1,6-dihydro-1-methyl-3-(2-methylpropyl)-7H-pyrazolo[4,3-d]pyrimidin-7-one

     Code :  
     CAS  
     Formula  C23H32N6O4S
     M.Wt  488.6
     Category  Sildenafil
    Sildenafil EP Impurity A ; Sildenafil USP RC A ; Sildenafil Isobutyl Analog ; 5-[2-Ethoxy-5-[(4-methyl-4-oxido-1-piperazinyl)sulfonyl]phenyl]-1,6-dihydro-1-methyl-3-(2-methylpropyl)-7H-pyrazolo[4,3-d]pyrimidin-7-one
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    Product Name    : Sildenafil Dimer Impurity ;  5-[2-Ethoxy-5-[4-[4-ethoxy-3-(1-methyl-7-oxo-3-propyl-4,7-dihydro-1H-pyrazolo[4,3-d]pyrimidin-5-yl)phenyl]sulfonyl]phenyl]-1-methyl-3-n-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one | 1346603-48-2

     Code :  
     CAS  1346603-48-2
     Formula  C34H38N8O6S
     M.Wt  686.78
     Category  Sildenafil
    Sildenafil Dimer Impurity ;  5-[2-Ethoxy-5-[4-[4-ethoxy-3-(1-methyl-7-oxo-3-propyl-4,7-dihydro-1H-pyrazolo[4,3-d]pyrimidin-5-yl)phenyl]sulfonyl]phenyl]-1-methyl-3-n-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one | 1346603-48-2
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    Product Name    : Sildenafil Di-Amide Impurity ; 4-(2-Ethoxybenzamido)-1-methyl-3-n-propylpyrazole-5-carboxamideSildenafil Di-Amide Impurity ; 4-(2-Ethoxybenzamido)-1-methyl-3-n-propylpyrazole-5-carboxamide | 139756-03-9

     Code :  
     CAS  139756-03-9
     Formula  C17H22N4O3
     M.Wt  330.38
     Category  Sildenafil
    Sildenafil Di-Amide Impurity ; 4-(2-Ethoxybenzamido)-1-methyl-3-n-propylpyrazole-5-carboxamideSildenafil Di-Amide Impurity ; 4-(2-Ethoxybenzamido)-1-methyl-3-n-propylpyrazole-5-carboxamide | 139756-03-9
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    Product Name    : Sildenafil Descarbon Impurity ; 3-(6,7-Dihydro-1-methyl-7-oxo-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-5-yl)-N-[2-(dimethylamino)ethyl]-4-ethoxy-benzenesulfonamide | 1393816-99-3 

     Code :  
     CAS  1393816-99-3
     Formula  C21H30N6O4S
     M.Wt  462.57
     Category  Sildenafil
    Sildenafil Descarbon Impurity ; 3-(6,7-Dihydro-1-methyl-7-oxo-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-5-yl)-N-[2-(dimethylamino)ethyl]-4-ethoxy-benzenesulfonamide  | 1393816-99-3 
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    Product Name    : Sildenafil Des(methylpiperazinyl) Chlorosulfone Impurity ; 4-Ethoxy-3-(7-oxo-3-propyl-6,7-dihydro-1H-pyrazolo[4,3-d] pyrimidin-5-yl) benzene-1-sulfonyl chloride |  139756-31-3

     Code :  
     CAS  139756-31-3
     Formula  C16H17ClN4O4S
     M.Wt  396.85
     Category  Sildenafil
    Sildenafil Des(methylpiperazinyl) Chlorosulfone Impurity ; 4-Ethoxy-3-(7-oxo-3-propyl-6,7-dihydro-1H-pyrazolo[4,3-d] pyrimidin-5-yl) benzene-1-sulfonyl chloride |  139756-31-3
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    Product Name    : Sildenafil Chlorosulfone O-Desethyl Impurity ; 4-Hydroxy-3-(1-methyl-7-oxo-3-propyl-6,7-dihydro-1H-pyrazolo[4,3-d] pyrimidin-5-yl)benzene-1-sulfonyl chloride | 139756-27-7

     Code :  
     CAS  139756-27-7
     Formula  C15H15ClN4O4S
     M.Wt  382.82
     Category  Sildenafil
    Sildenafil Chlorosulfone O-Desethyl Impurity ; 4-Hydroxy-3-(1-methyl-7-oxo-3-propyl-6,7-dihydro-1H-pyrazolo[4,3-d] pyrimidin-5-yl)benzene-1-sulfonyl chloride  | 139756-27-7
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    Product Name    : Sildenafil Chlorosulfone Impurity ;Sildenafil Chlorosulfone ; Sildenafil Chlorosulfonyl Impurity ; 5-(5-Chlorosulfonyl-2-ethoxyphenyl)-1-methyl-3-propyl-1,6-dihydro-7H-pyrazole[4,3-d]pyrimidine-7-on |  139756-22-2

     Code :  
     CAS  139756-22-2
     Formula  C17H19ClN4O4S
     M.Wt  410.88
     Category  Sildenafil
    Sildenafil Chlorosulfone Impurity ;Sildenafil Chlorosulfone ; Sildenafil Chlorosulfonyl Impurity ; 5-(5-Chlorosulfonyl-2-ethoxyphenyl)-1-methyl-3-propyl-1,6-dihydro-7H-pyrazole[4,3-d]pyrimidine-7-on |  139756-22-2
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    Product Name    : Sildenafil Chlorosulfone 2-Methyl Isomer ; 4-Ethoxy-3-(2-methyl-7-oxo-3-propyl-6,7-dihydro-2H-pyrazolo[4,3-d] pyrimidin-5-yl)benzene-1-sulfonyl chloride |  501120-42-9

     Code :  
     CAS  501120-42-9
     Formula  C17H19ClN4O4S
     M.Wt  410.88
     Category  Sildenafil
    Sildenafil Chlorosulfone 2-Methyl Isomer ; 4-Ethoxy-3-(2-methyl-7-oxo-3-propyl-6,7-dihydro-2H-pyrazolo[4,3-d] pyrimidin-5-yl)benzene-1-sulfonyl chloride |  501120-42-9
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    Product Name    : Sildenafil Chloroacetyl Impurity ; 5-[5-(2-Chloroacetyl)-2-ethoxyphenyl]-1,6-dihydro-1-methyl-3-propyl-7H-pyrazolo[4,3-d]pyrimidin-7-one | 1058653-74-9

     Code :  
     CAS  1058653-74-9
     Formula  C19H21ClN4O3
     M.Wt  388.85
     Category  Sildenafil
    Sildenafil Chloroacetyl Impurity ; 5-[5-(2-Chloroacetyl)-2-ethoxyphenyl]-1,6-dihydro-1-methyl-3-propyl-7H-pyrazolo[4,3-d]pyrimidin-7-one | 1058653-74-9
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    Product Name    : Sildenafil Carboxylic Acid Impurity ; 4-Ethoxy-3-(1-methyl-7-oxo-3-propyl-6,7-dihydro-1H-pyrazolo[4,3-d] pyrimidin-5-yl)benzoic acid |  147676-78-6 

     Code :  
     CAS  147676-78-6
     Formula  C18H20N4O4
     M.Wt  356.38
     Category  Sildenafil
    Sildenafil Carboxylic Acid Impurity ; 4-Ethoxy-3-(1-methyl-7-oxo-3-propyl-6,7-dihydro-1H-pyrazolo[4,3-d] pyrimidin-5-yl)benzoic acid |  147676-78-6 
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    Product Name    : Sildenafil Amino Amide Impurity ; 4-Amino-1-methyl-3-propylpyrazole-5-carboxamide | 139756-02-8

     Code :  
     CAS  139756-02-8
     Formula  C8H14N4O
     M.Wt  182.22
     Category  Sildenafil
    Sildenafil Amino Amide Impurity ; 4-Amino-1-methyl-3-propylpyrazole-5-carboxamide | 139756-02-8
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    Product Name    : Sildenafil Aldehyde Impurity ; 2-Ethoxy-5-(4-methyl-piperazin-1-yl-sulphonyl)-benzaldehyde

     Code :  
     CAS  
     Formula  C14H20N2O4S
     M.Wt  312.38
     Category  Sildenafil
    Sildenafil Aldehyde Impurity ; 2-Ethoxy-5-(4-methyl-piperazin-1-yl-sulphonyl)-benzaldehyde
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    Product Name    : Sildenafil 2-Ethoxybenzoyl Chloride Impurity ;  2-Ethoxybenzoyl chloride | 42926-52-3

     Code :  
     CAS  42926-52-3
     Formula  C9H9ClO2
     M.Wt  184.62
     Category  Sildenafil
    Sildenafil 2-Ethoxybenzoyl Chloride Impurity ;  2-Ethoxybenzoyl chloride | 42926-52-3

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