This smiles fails- probably due to the fact that the
eCount for the 5 membered all carbon rings can not give
an eCount of 6. See attached pic
structure of 187-78-0
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SMILES parsing works fine; the hueckel aromaticity perception algorithm does not take into account four-ring systems; Moreover, it assumed a ring current, which cannot apply to all atoms in this molecule. It's outside the scope of current CDK algorithms.