Abstract: A lipid compound or a derivative thereof and a pharmaceutical composition employing the same are provided. The lipid compound has a structure represented by Formula (I): wherein Z1, Z2, Z3 and Z4 are as disclosed in the specification.

Abstract: A water pump structure comprises a bottom pipe, a top pipe, and a motor. The bottom pipe is provided with an outlet, and an inlet which is connected to a water source by a siphonage pipe. The top pipe is provided with an outlet, and an inlet which is connected with the outlet of the bottom pipe by a siphonage pipe. The top pipe and the bottom pipe is fastened end to end in conjunction with an ON-OFF valve. The motor is connected with the top pipe by a connection pipe which is engaged at one end with the outlet of the top pipe. The water in the top pipe is drawn up into a water storage tank by the motor. The top pipe is replenished with water by the bottom pipe by siphonage, whereas the bottom pipe is replenished with water by the water source by siphonage.

Abstract: A flush toilet comprises a bowl, a water tank, a drainpipe in communication with the basin of the bowl and a septic tank, and a loop connected between the bowl and the drainpipe to enable parts of water and air in the drainpipe to flow into the bowl basin at such time when the toilet is flushed, thereby enabling the waste matter to fall rapidly by its own weight into the septic tank.