“…2B) indicates that the molecular motions of the drug, which appear to be axially symmetrical, give rise to a 30‐fold reduction of the static quadrupolar interaction (∼175 kHz). From previous studies on related compounds, it is assumed that the principal rotational axis of the drug is coincident with the CO bond and parallel with the bilayer normal 16. Although the conformation of the molecule in DMPC membranes cannot be determined unambiguously, it was assumed as a starting point for the analysis that the drug adopts a planar, extended structure in which the angle between CD bond and the rotational axis is 60°.…”