163 / 363
V
aclavik
et al
.:
J
ournal of
AOAC I
nternational
V
ol
.
99, N
o
.
1, 2016
61
Analyte
Chemical Abstracts Service No.
Formula
Note
Structure
Imidazosagatriazinone
139756-21-1
C
17
H
20
N
4
O
2
—
Isosildenafil
253178-46-0
C
22
H
30
N
6
O
4
S
—
N
-Desethyl vardenafil
448184-46-1
C
21
H
28
N
6
O
4
S
—
N
-Desmethyl sildenafil
139755-82-1
C
21
H
28
N
6
O
4
S
—
Nitrodenafil
147676-99-1
C
17
H
19
N
5
O
4
—
N
-Octyl nortadalafil
1173706-35-8
C
29
H
33
N
3
O
4
—
Noracetildenafil
949091-38-7
C
24
H
32
N
6
O
3
—
Norneosildenafil
371959-09-0
C
22
H
29
N
5
O
4
S
—
Table 2. (
continued
)
Candidates for 2016 Method of the Year
162