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10 

Tadalafil Dichloro Impurity

CAS No. N/A

C22H18Cl2N2O5 M.W. 461.31

T-1030

Tadalafil Dimethoxy Impurity

CAS No. 1356345-67-9

C23H23N3O4 M.W. 405.46

T-1031

Tadalafil Impurity (1,1

Œ-

ethylidenebistryptophan)

C24H26N4O4 M.W. 434.50

T-1032

Tadalafil Related Impurity 1

CAS No. N/A

C26H25N3O4 M.W. 443.51

T-1033

Tadalafil Acid Impurity

CAS No. N/A

C19H16N2O4 HCl M.W. 336.35 36.46

T-1034

Chloropretadalafil

C22H19ClN2O5 M.W. 426.86

T-104

N-Octyl-nortadalafil

C29H33N3O4 M.W. 487.60

T-105

N-Butyl Tadalafil

C25H25N3O4 M.W. 431.50

T-106

Nortadalafil

C21H17N3O4 M.W. 375.39

T-107

Tadalafil Impurity A

CAS No. NA

C20H19N3O3 M.W. 349.39

T-108

Tadalafil Impurity B

CAS No. NA

C20H19N3O3 M.W. 349.39

T-109

Vardenafil Related Compounds (commercial standards available) – includes deuterated standards. 

Pseudovardenafil

CAS No. 224788-34-5

C22H29N5O4S M.W. 459.57

V-051

Hydroxythio Vardenafil

C23H32N6O4S2 M.W. 520.68

V-0510

Vardenafil Impurity 1

CAS No. 1417529-67-9

C17H18N4O4 M.W. 342.36

V-0511

Vardenafil Impurity 2

CAS No. 1417529-69-1

C23H30N6O6S M.W. 518.60

V-0512