Docking system suitable for transferring powdered pharmaceutical agents from an isolator to a preparation container, wherein the docking system comprises - a B-part which can be fastened to the preparation container at the opening thereof, and - an A-part which is arranged on the isolator, wherein - the A- and B-part can be interconnected by means of connecting elements such as bayonet locks, positioning bolts and rollers and - a corrugated-tube compensator through which the transfer of pharmaceutical agents from the isolator into the preparation container takes place is designed for length compensation, is part of the B-part and - wherein one end face of the compensator is connected to a connecting flange which has a tri-clamp clamping connection by means of which the entire B-part can be fastened to the preparation container, and - on the opposite end face of the compensator a base flange is present on the B-part, by means of which the compensator can be fastened to a base flange present on the A-part, wherein - the opening of the base flange of the A-part can be closed with an isolator cover and a flange cover that can be fastened to the base flange of the B-part and - a lifting system is arranged between a carrier and a carrier plate for length compensation of the compensator, which arrives at the isolator when a preparation container is docked, wherein - on the isolator cover there is a rotary device having a rotatable molding which points in the direction of the flange cover and can be inserted with an outer edge contour into a complementary recess in the flange cover and consequently a direction-independent rotational movement of the flange cover about its central axis is made possible, - wherein the docking system is designed in such a way that, with the aid of the diametrically acting rotary locks (18, 19), depending on the direction of rotation either the flange cover is connected to the base flange and, on the other hand, the connection between the flange cover and the isolator cover is open, and, when the direction of rotation is reversed, the flange cover is connected to the isolator cover and the connection between the flange cover and the base flange is open, and - that a pivoting means is located on the outer edge of the isolator cover and on the base flange, which means is designed to open and close the isolator cover. - a B-part which can be fastened to the preparation container at the opening thereof, and - an A-part which is arranged on the isolator, wherein - the A- and B-part can be interconnected by means of connecting elements such as bayonet locks, positioning bolts and rollers and - a corrugated-tube compensator through which the transfer of pharmaceutical agents from the isolator into the preparation container takes place is designed for length compensation, is part of the B-part and - wherein one end face of the compensator is connected to a connecting flange which has a tri-clamp clamping connection by means of which the entire B-part can be fastened to the preparation container, and - on the opposite end face of the compensator a base flange is present on the B-part, by means of which the compensator can be fastened to a base flange present on the A-part, wherein - the opening of the base flange of the A-part can be closed with an isolator cover and a flange cover that can be fastened to the base flange of the B-part and - a lifting system is arranged between a carrier and a carrier plate for length compensation of the compensator, which arrives at the isolator when a preparation container is docked, wherein - on the isolator cover there is a rotary device having a rotatable molding which points in the direction of the flange cover and can be inserted with an outer edge contour into a complementary recess in the flange cover and consequently a direction-independent rotational movement of the flange cover about its central axis is made possible, - wherein the docking system is designed in such a way that, with the aid of the diametrically acting rotary locks (18, 19), depending on the direction of rotation either the flange cover is connected to the base flange and, on the other hand, the connection between the flange cover and the isolator cover is open, and, when the direction of rotation is reversed, the flange cover is connected to the isolator cover and the connection between the flange cover and the base flange is open, and - that a pivoting means is located on the outer edge of the isolator cover and on the base flange, which means is designed to open and close the isolator cover.