As I stare at this one, I suspect the later processing might show it a big more clearly than the DR7 jpeg version. I cant quite trace two sets of symmetric, undisturbed spiral arms, so I'd suspect an interaction at this point. he foreground galaxy looks like there is one major arm winding outward, something vanishingly rare in isolated galaxies. Still, that dust lane is so nicely silhouetted, and it shows an interesting offset between the peak of starlight and dust attenuation in that arm.
Thanks for pointing out the "dumbbell" systems in Liu et al. I've seen the paper but missed this subset of their galaxy list.