Ringlets

While looking at this mega-molecule, I've made the realization that it really is just a repeating sequence. Each of the rings has exactly the same kinds of Atoms in the same relative positions. Like a full ring of six Sixes, these rings are also six atoms around. Like the other monster I found that had rings, in this case, like the central ring of that monster, the ring is interrupted by the presence of an Eight where a Six might easily be inserted.

Always to the same side of the eight is a Six, that is connected to the Six that should be where the Eight it. This structural Six, outside the ring, holds a pair of place-holder Ones, with an Eight-One pair making the final connection to the outboard Six. One atom left of where this external Six attaches, is the Six that hooks to a structural Eight to make the chain go. Similarly, one step to the anti-left of the Eight-in-the-Ring, is the other Six that connects to the another interconnecting structural Eight.

Hanging from the bottom pair of Sixes that round out the ring, are a pair of Eight-One formations. To me, the Eight-One formation ends the line and calls that branch to be complete. It may be that there are other reasons why these two Sixes are caped with an Eight-One pair and not just letting a singleton One hold the place.