This is a cycles puzzle with extra steps.

Theory min rate is 6. While the 6 atom monomer can be assembled within a 6 cycle loop, I couldn't find a way for pivots to clear it off the bonders fast enough, so 7 rate it is. Latency could possibly be improved, but keeping the molecule in place long enough to do meaningful work on it while still clearing it fast enough so as not to run into the next input is a difficult challenge, requiring more pivots/regrabs than the operations necessary to assemble the output might suggest. 