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smiles:CCN1C(=O)C2=C(N=CN2)N(C1=O)C
Read as SMILES
read as SMILES
C
0
C
1
N
2
C
3
O
4
C
5
C
6
N
7
C
8
N
9
H
N
10
C
11
O
12
C
13
Hydrogens
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Carbon labels
✓
Atom numbers
R/S labels
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