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Here are the -ocenes! Made by putting an atom of one element between two rings of Carbon and Hydrogen, there are a surprising number of these. (if you wanna design them like these: draw them mostly as their base element with different colors) As for these three, Ferrocene is used as a gasoline additive to lower engine smoking in cars, and the other two, Uranocene and Berkelocene, aren't used in anything except for atomic science.

Their name is Ghiorsium, and they collect stamps.