The spectra were acquired in deuterated solvent (supplied by Deutero and Eurisotop) at 300 K on a Bruker AV2-400 (400 MHz) or Bruker AV2-500 (500 MHz) device. Chemical shift (δ) was given in ppm relative to residual solvent resonances. The used solvent is indicated prior to the shifts in parentheses respectively. The chemical shift of residual solvent was gathered from literature. Diastereotopic proton resonances are indicated using indices a and b (Ha and Hb) or for rigid ring systems such as trans-decalin-type ring fusion indices ax and eq (Hax and Heq) respectively, where ax is used for the (pseuo-)axial proton and eq for the (pseudo-)equatorial proton. Chemically equivalent carbons (including those related by fast molecular motion compared to the NMR timescale) are assigned with the same number, and the prime symbol (') is used to distinguish them. Visualization and processing of the acquired data was performed with the program MestReNova (version 12.0.0-20080).