The configurations at the three chiral centres are R, R and R. The two substituents of the almost planar cyclopentanone are trans and the C2-C6-C10-C11 torsion angle is - 79 (1)-degrees.
Ouvrard, N., Declercq, J.-P., Baldy, A., Rodriguez, J., Santelli, M., & Feneaudupont, J. (1994). Stereochemistry of the Carroll Rearrangement - Structure of (+)-(2r)-2-[(1r,5r)-5-methyl-2-oxocyclopentyl]-propionic Acid, C9h14o3. Acta Crystallographica. Section C: Crystal Structure Communications, 50, 624-625. https://doi.org/10.1107/S0108270193010297 (Original work published 1994)