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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