bool OEAtomIsInAromaticRingSize(const OEAtomBase &atm, unsigned int size)
Determine whether the given atom is in an aromatic cycle of the
specified size. The function OEFindRingAtomsAndBonds
should have
been called before calling this function. If the atom is not aromatic,
i.e. OEAtomBase::IsAromatic
returns false, then this
function also returns false.