The present invention is directed to a compound of formula, 1racemic-diastereomeric mixtures thereof, optical isomers thereof, prodrugs thereof, isotopes thereof or pharmaceutically-acceptable salts of said compound, isomers, prodrugs and isotopes, wherein the variables are defined herein. The intermediate backplane also includes at least one monitor interface bus configured to be coupled to the at least one transducer monitoring module and the second backplane and an intermediate backplane bus configured to be coupled to the at least one transducer monitoring module and the system monitoring module. The ratio of the surface area of the recess 11A of the split 1A to that of the recess 11B of the split 1B ranges from 52:48 to 66:34. When the current flows in the direction shown by arrow A, the drag forces on turbines and support strut cause the apparatus to pivot about point and pitch over into condition denoted by and shown in broken lines.