The invention relates to substituted amino-thiourea compounds of formula, to the enantiomers, diastereomers and salts thereof and to compositions comprising such compounds. The delivery system includes a delivery catheter having a device-containing portion adjacent to the distal end thereof, and an inner member extending through the catheter and beyond the distal end thereof, to an atraumatic distal tip portion forward of the catheter distal end. The system and method can be naturally applied in various applications in which plant performance functions have multiple independent parameters, and it does not depend upon frequency separation to distinguish between system dimensions. In response to a further deflection of the probe element, the latter is able to be transferred to a stop position, in which the second contact point of the probe element touches the stationary component in a supporting manner. The second halves are rotationally shifted about the rotational axis relative to the first halves. The image forming apparatus includes a body, a plurality of developing units arranged in the body along vertical direction of the body, a cover unit that opens or closes a side of the body an exposing unit provided at the cover unit so as to move in association with the closing or opening movement of the cover unit.