2
PHAÂN LOAÏI
3
PENAM = PENICILLIN
HN
S
azetidine-2-on
NH
Thiazolidine
N
S
Penam
+
O
O
N
S
COOH
H
HN
O
O
R
H
H
1
2
3
4
5
6
7
Penicillin
4
DAÃN CHAÁT PENAM
Penem : Khung penam, C
2
=C
3
Carbapenem : Khung penam, S Æ CH
2
, C
2
=C
3
Oxapenam : Khung penam, S Æ O (clavam)
N
O
COOH
H
HN
O
O
R
H
H
1
2
3
4
5
6
7
Oxapenam (clavan)
N
H
2
C
COOH
HN
O
O
R
H
H
1
2
3
4
5
6
7
Carbapenem
N
S
COOH
HN
O
O
R
H
H
1
2
3
4
5
6
7
Penem
5
CEPHEM = CEPHALOSPORIN
azetidine-2-on
NH
+
O
HN
S
dihydrothiazine
N
O
S
cephem
NH
N
O
O
R
1
H
H
1
5
S
3
4
6
7
COOH
R
2
6
DAÃN CHAÁT CEPHEM
Cephamycin : khung cephem, H
7
Æ OCH
3
Carbacephem : khung cephem, S
5
Æ C
Oxacephem : khung cephem, S
5
Æ O
N
NH
O
O
R
1
OCH
3
H
1
3
4
5
6
7
S
COOH
R
2
Cephamycin
N
NH
O
O
R
1
R
3
H
1
3
4
5
6
7
O
COOH
R
2
Oxacephem
N
NH
O
O
R
1
H
H
1
3
4
5
6
7
H
2
C
COOH
R
2
Carbacephem
7
MONOBACTAM
Voøng azetidin-2-on ñöùng rieâng reõ
N
NH
O
O
R
1
H
R
2
1
SO
3
H
R
3