Different SMILES for same compound

Marvin 5.2.6 generates 2 different SMILES strings for the same compound, depending on how the molecule is drawn:

CCC(=O)C(\C)=C(/CC)CC
CCC(=O)C(\C)=C(\CC)CC

 Is this an issue with SMILES or a problem with the way the SMILES generator is implemented in Marvin?

 

 

This was a bug in the 5.2 releases. Please update to 5.3 where the result is:

CCC(=O)C(C)=C(CC)CC

As one side of the double is symmetric the '\' '/' signs are superfluous.

Andras

Thanks!