code: private static boolean isRingSystemSproutedWithNonRingDoubleBonds(IAtomContainer fullContainer,
              IAtomContainer isolatedRingSystem) {
          Iterator<IAtom> atoms = isolatedRingSystem.atoms().iterator();
          while (atoms.hasNext()) {
              IAtom atom = atoms.next();
              Iterator<IBond> neighborBonds = fullContainer.getConnectedBondsList(atom).iterator();
              while (neighborBonds.hasNext()) {
                  IBond neighborBond = neighborBonds.next();
                  if (!neighborBond.getFlag(CDKConstants.ISINRING)
                          && neighborBond.getOrder() == Order.DOUBLE
                          || neighborBond.getOrder() == Order.TRIPLE) {
                      if (!("N.sp2.3".equals(atom.getAtomTypeName()) && "O.sp2".equals(neighborBond
                                                                                           .getOther(atom).getAtomTypeName()))) return true;
                  }
              }
          }
          return false;
      }
docs: Determines if the isolatedRingSystem has attached double bonds, which are not part of the ring system itself,
  and not part of any other ring system. Exceptions: a N.sp2.3 nitrogen with a double ring to an
  oxygen outwards.