How many carbon 13 NMR signals in this diagram, diagram provided!?

Question

Is there really symmetry at the carbon area I've shown, because as far as I know the molecule doesn't seem very symmetrical at all, even after trying to get a stereoisomer where the bonds are in a straight line.

Plus the pentagon shaped carbon set basically disables any symmetry anyway....

http://www.imageno.com/thumbs/20080821/b7akl964vfoi.jpg

Answer 1

There is 27 carbons. I'd think that there are 26 signals, because the two at the end  would be in the same environment

Answer 2

No "pentagon-shaped" carbons. When atoms can rotate freely and be mirror images, they give the same NMR. For those two methyl groups at the end, put one above the plane and one below - then they mirror-image one another. Think 3-D; NOT 2-D