virtual bool IsAromatic() const
Return the Boolean aromatic property of a bond. The default value is
false. The aromatic property of a bond can be set using the
OEBondBase::SetAromatic
method. The aromatic properties of bonds
and atoms in a molecule are typically set by calling either the OEChem
OEAssignAromaticFlags
function, or possibly the
OEClearAromaticFlags
function.