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V

aclavik

et al

.:

J

ournal of

AOAC I

nternational

V

ol

.

99, N

o

.

1, 2016 

59

Analyte

Chemical Abstracts Service No.

Formula

Note

Structure

Aminotadalafil

385769-84-6

C

21

H

18

N

4

O

4

a

Benzamidenafil

1020251-53-9

C

19

H

23

N

3

O

6

Benzylsildenafil

1446089-89-2

C

28

H

34

N

6

O

4

S

Carbodenafil

Not available

C

24

H

32

N

6

O

3

Chlorodenafil

1058653-74-9

C

19

H

21

ClN

4

O

3

Chloropretadalafil

171489-59-1

C

22

H

19

ClN

2

O

5

Desmethylthiosildenafil

479073-86-4

C

21

H

28

N

6

O

3

S

2

Table 2. (

continued

)

Candidates for 2016 Method of the Year

160