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H
C
N
O
S
P
F
Cl
Br
...
●
12
ht
O
-
P
O
-
O
O
O
P
O
-
O
-
O
O
P
O
O
-
O
-
O
P
O
-
O
-
O
O
P
O
-
O
-
O
O
P
O
-
O
-
O
Na
+
Na
+
Na
+
Na
+
Na
+
Na
+
Na
+
Na
+
Na
+
Na
+
Na
+
Na
+
[Chiral]
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