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Analyte
CAS No.
Formula
Note
Structure
Benzamidenafil
1020251-
53-9
C
19
H
23
N
3
O
6
-
N
H
O
NH
HO
O
O
N
O
O
Benzylsildenafil
Not
available
C
28
H
34
N
6
O
4
S
-
N
N
S
O
O
O
N
HN
N
N
O
Carbodenafil
Not
available
C
24
H
32
N
6
O
3
-
O
N
HN
N
N
O
N
O
N
Chlorodenafil
1058653-
74-9
C
19
H
21
ClN
4
O
3
-
O
N
H
N
N
N
O
Cl
O
Chloropretadalafil
171489-59-
1
C
22
H
19
ClN
2
O
5
-
HN
N
O
O
Cl
O
O
O
Desmethylthiosildenafil
479073-86-
4
C
21
H
28
N
6
O
3
S
2
-
N
H
N
N
N
S
O
S
N
O O
HN
Candidates for 2016 Method of the Year
145